/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:26:55,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:26:55,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:26:55,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 21:26:55,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 21:26:55,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 21:26:55,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 21:26:55,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 21:26:55,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 21:26:55,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 21:26:55,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 21:26:55,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-15 21:26:55,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 21:26:55,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 21:26:55,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 21:26:55,144 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 21:26:55,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:26:55,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:26:55,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:26:55,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:26:55,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:26:55,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:26:55,180 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:26:55,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:26:55,180 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:26:55,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:26:55,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:26:55,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:26:55,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:26:55,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:26:55,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:26:55,182 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:26:55,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:26:55,182 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:26:55,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:26:55,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:26:55,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:26:55,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:26:55,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:26:55,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:26:55,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:26:55,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:26:55,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:26:55,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:26:55,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:26:55,183 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:26:55,184 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:26:55,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:26:55,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:26:55,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:26:55,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:26:55,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:26:55,412 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:26:55,413 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:26:55,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl [2022-03-15 21:26:55,414 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl' [2022-03-15 21:26:55,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:26:55,436 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:26:55,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:26:55,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:26:55,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:26:55,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/1) ... [2022-03-15 21:26:55,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/1) ... [2022-03-15 21:26:55,459 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:26:55,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:26:55,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:26:55,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:26:55,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:26:55,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/1) ... [2022-03-15 21:26:55,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/1) ... [2022-03-15 21:26:55,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/1) ... [2022-03-15 21:26:55,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/1) ... [2022-03-15 21:26:55,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/1) ... [2022-03-15 21:26:55,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/1) ... [2022-03-15 21:26:55,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/1) ... [2022-03-15 21:26:55,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:26:55,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:26:55,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:26:55,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:26:55,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/1) ... [2022-03-15 21:26:55,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:26:55,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:55,505 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 21:26:55,531 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 21:26:55,550 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:26:55,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:26:55,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:26:55,551 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:26:55,551 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:26:55,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:26:55,551 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:26:55,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:26:55,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:26:55,552 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 21:26:55,588 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:26:55,589 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:26:55,665 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:26:55,679 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:26:55,679 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 21:26:55,681 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:26:55 BoogieIcfgContainer [2022-03-15 21:26:55,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:26:55,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:26:55,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:26:55,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:26:55,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:26:55" (1/2) ... [2022-03-15 21:26:55,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36748d3e and model type counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:26:55, skipping insertion in model container [2022-03-15 21:26:55,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:26:55" (2/2) ... [2022-03-15 21:26:55,688 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-fun.wvr.bpl [2022-03-15 21:26:55,692 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:26:55,692 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:26:55,692 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:26:55,692 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:26:55,727 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 21:26:55,784 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:26:55,790 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 21:26:55,791 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 21:26:55,807 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:26:55,818 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 22 transitions, 60 flow [2022-03-15 21:26:55,821 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 22 transitions, 60 flow [2022-03-15 21:26:55,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 60 flow [2022-03-15 21:26:55,850 INFO L129 PetriNetUnfolder]: 2/20 cut-off events. [2022-03-15 21:26:55,850 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 21:26:55,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2022-03-15 21:26:55,859 INFO L116 LiptonReduction]: Number of co-enabled transitions 48 [2022-03-15 21:26:56,147 INFO L131 LiptonReduction]: Checked pairs total: 48 [2022-03-15 21:26:56,147 INFO L133 LiptonReduction]: Total number of compositions: 10 [2022-03-15 21:26:56,156 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 13 transitions, 42 flow [2022-03-15 21:26:56,179 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 21:26:56,180 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 21:26:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 21:26:56,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:56,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:56,186 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:56,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1250692962, now seen corresponding path program 1 times [2022-03-15 21:26:56,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:56,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915829543] [2022-03-15 21:26:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:56,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:56,328 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 21:26:56,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:56,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915829543] [2022-03-15 21:26:56,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915829543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:26:56,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:26:56,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 21:26:56,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1213801550] [2022-03-15 21:26:56,332 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:56,336 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:56,350 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 21:26:56,350 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:56,449 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:26:56,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:26:56,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:26:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:26:56,474 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 21:26:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:56,501 INFO L93 Difference]: Finished difference Result 21 states and 37 transitions. [2022-03-15 21:26:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:26:56,503 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 21:26:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:56,512 INFO L225 Difference]: With dead ends: 21 [2022-03-15 21:26:56,512 INFO L226 Difference]: Without dead ends: 18 [2022-03-15 21:26:56,513 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 21:26:56,517 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:56,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:26:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-15 21:26:56,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-15 21:26:56,544 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 21:26:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2022-03-15 21:26:56,546 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 8 [2022-03-15 21:26:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:56,547 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2022-03-15 21:26:56,547 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 21:26:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2022-03-15 21:26:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 21:26:56,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:56,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:56,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:26:56,549 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:56,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash 116753101, now seen corresponding path program 1 times [2022-03-15 21:26:56,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:56,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594263815] [2022-03-15 21:26:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:56,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:56,635 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 21:26:56,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:56,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594263815] [2022-03-15 21:26:56,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594263815] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:26:56,639 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:26:56,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:26:56,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [32212746] [2022-03-15 21:26:56,640 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:56,642 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:56,647 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2022-03-15 21:26:56,648 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:56,691 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [118#(< i1 N1)] [2022-03-15 21:26:56,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:26:56,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:56,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:26:56,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:26:56,701 INFO L87 Difference]: Start difference. First operand 18 states and 32 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 21:26:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:56,841 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2022-03-15 21:26:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:26:56,856 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 21:26:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:56,856 INFO L225 Difference]: With dead ends: 25 [2022-03-15 21:26:56,856 INFO L226 Difference]: Without dead ends: 22 [2022-03-15 21:26:56,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:26:56,858 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:56,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:56,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-15 21:26:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2022-03-15 21:26:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 26 transitions. [2022-03-15 21:26:56,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 26 transitions. Word has length 9 [2022-03-15 21:26:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:56,863 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 26 transitions. [2022-03-15 21:26:56,863 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 21:26:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 26 transitions. [2022-03-15 21:26:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 21:26:56,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:56,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:56,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 21:26:56,864 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:56,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:56,865 INFO L85 PathProgramCache]: Analyzing trace with hash 177496950, now seen corresponding path program 1 times [2022-03-15 21:26:56,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:56,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112319778] [2022-03-15 21:26:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:56,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:56,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:56,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112319778] [2022-03-15 21:26:56,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112319778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:56,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688334657] [2022-03-15 21:26:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:56,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:56,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:56,977 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 21:26:56,986 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 21:26:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:57,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 21:26:57,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:57,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:57,167 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 21:26:57,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688334657] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:57,168 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 21:26:57,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2022-03-15 21:26:57,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1365031796] [2022-03-15 21:26:57,168 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:57,169 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:57,170 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2022-03-15 21:26:57,171 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:57,279 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [236#(< i1 N1), 237#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:26:57,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:26:57,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:26:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-15 21:26:57,280 INFO L87 Difference]: Start difference. First operand 15 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:57,399 INFO L93 Difference]: Finished difference Result 32 states and 50 transitions. [2022-03-15 21:26:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:26:57,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 21:26:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:57,401 INFO L225 Difference]: With dead ends: 32 [2022-03-15 21:26:57,401 INFO L226 Difference]: Without dead ends: 32 [2022-03-15 21:26:57,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:26:57,405 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:57,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-15 21:26:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2022-03-15 21:26:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2022-03-15 21:26:57,416 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 9 [2022-03-15 21:26:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:57,417 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2022-03-15 21:26:57,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2022-03-15 21:26:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:26:57,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:57,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:57,445 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 21:26:57,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:57,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1207415097, now seen corresponding path program 1 times [2022-03-15 21:26:57,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:57,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939977573] [2022-03-15 21:26:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:57,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:57,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939977573] [2022-03-15 21:26:57,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939977573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:57,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443165587] [2022-03-15 21:26:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:57,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:57,700 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 21:26:57,701 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 21:26:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:57,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:26:57,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:57,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 21:26:57,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 21:26:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:57,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:57,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-15 21:26:57,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-15 21:26:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:57,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443165587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:57,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:57,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-03-15 21:26:57,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [92963270] [2022-03-15 21:26:57,856 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:57,858 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:57,861 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 22 transitions. [2022-03-15 21:26:57,861 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:57,936 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:26:57,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:26:57,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:57,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:26:57,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:26:57,937 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:57,972 INFO L93 Difference]: Finished difference Result 41 states and 74 transitions. [2022-03-15 21:26:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:26:57,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 21:26:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:57,974 INFO L225 Difference]: With dead ends: 41 [2022-03-15 21:26:57,974 INFO L226 Difference]: Without dead ends: 38 [2022-03-15 21:26:57,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:26:57,980 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:57,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:26:57,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-15 21:26:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-03-15 21:26:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 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 21:26:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 59 transitions. [2022-03-15 21:26:57,992 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 59 transitions. Word has length 10 [2022-03-15 21:26:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:57,992 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 59 transitions. [2022-03-15 21:26:57,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 59 transitions. [2022-03-15 21:26:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:26:57,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:57,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:58,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:58,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-15 21:26:58,212 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2139304669, now seen corresponding path program 2 times [2022-03-15 21:26:58,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:58,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663025404] [2022-03-15 21:26:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:58,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:58,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:58,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663025404] [2022-03-15 21:26:58,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663025404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:58,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979983330] [2022-03-15 21:26:58,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:26:58,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:58,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:58,256 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 21:26:58,257 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 21:26:58,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:26:58,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:58,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:26:58,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:58,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 21:26:58,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 21:26:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:58,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:58,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-15 21:26:58,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-15 21:26:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:58,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979983330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:58,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:58,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-03-15 21:26:58,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [690756238] [2022-03-15 21:26:58,363 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:58,364 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:58,365 INFO L252 McrAutomatonBuilder]: Finished intersection with 14 states and 16 transitions. [2022-03-15 21:26:58,365 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:58,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:26:58,402 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:26:58,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:26:58,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:58,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:26:58,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:26:58,403 INFO L87 Difference]: Start difference. First operand 29 states and 59 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:58,432 INFO L93 Difference]: Finished difference Result 46 states and 90 transitions. [2022-03-15 21:26:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:26:58,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 21:26:58,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:58,433 INFO L225 Difference]: With dead ends: 46 [2022-03-15 21:26:58,434 INFO L226 Difference]: Without dead ends: 43 [2022-03-15 21:26:58,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:26:58,434 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:58,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:26:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-15 21:26:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-03-15 21:26:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 72 transitions. [2022-03-15 21:26:58,439 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 72 transitions. Word has length 10 [2022-03-15 21:26:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:58,439 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 72 transitions. [2022-03-15 21:26:58,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 72 transitions. [2022-03-15 21:26:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:26:58,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:58,440 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:58,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:58,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:58,658 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:58,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1249842470, now seen corresponding path program 2 times [2022-03-15 21:26:58,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:58,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383508655] [2022-03-15 21:26:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:58,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:58,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:58,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383508655] [2022-03-15 21:26:58,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383508655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:26:58,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:26:58,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:26:58,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1731413709] [2022-03-15 21:26:58,700 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:58,701 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:58,702 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 24 transitions. [2022-03-15 21:26:58,703 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:58,741 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [647#(< i2 N2)] [2022-03-15 21:26:58,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:26:58,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:26:58,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:26:58,742 INFO L87 Difference]: Start difference. First operand 33 states and 72 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:58,809 INFO L93 Difference]: Finished difference Result 44 states and 86 transitions. [2022-03-15 21:26:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:26:58,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 21:26:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:58,810 INFO L225 Difference]: With dead ends: 44 [2022-03-15 21:26:58,810 INFO L226 Difference]: Without dead ends: 43 [2022-03-15 21:26:58,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 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 21:26:58,811 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:58,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:26:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-15 21:26:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-03-15 21:26:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 21:26:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 71 transitions. [2022-03-15 21:26:58,815 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 71 transitions. Word has length 10 [2022-03-15 21:26:58,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:58,816 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 71 transitions. [2022-03-15 21:26:58,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 71 transitions. [2022-03-15 21:26:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:26:58,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:58,817 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:58,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 21:26:58,817 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:58,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1224860714, now seen corresponding path program 3 times [2022-03-15 21:26:58,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:58,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165437091] [2022-03-15 21:26:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:58,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:58,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165437091] [2022-03-15 21:26:58,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165437091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:58,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761356433] [2022-03-15 21:26:58,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:26:58,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:58,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:58,863 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 21:26:58,873 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 21:26:58,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 21:26:58,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:58,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:26:58,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:58,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:59,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761356433] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:59,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:59,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-15 21:26:59,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1741363362] [2022-03-15 21:26:59,050 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:59,051 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:59,053 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2022-03-15 21:26:59,053 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:59,137 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [837#(or (<= N2 i2) (< i1 N1)), 836#(< i1 N1)] [2022-03-15 21:26:59,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:26:59,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:59,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:26:59,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:26:59,139 INFO L87 Difference]: Start difference. First operand 33 states and 71 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 21:26:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:59,271 INFO L93 Difference]: Finished difference Result 57 states and 107 transitions. [2022-03-15 21:26:59,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:26:59,271 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 11 [2022-03-15 21:26:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:59,272 INFO L225 Difference]: With dead ends: 57 [2022-03-15 21:26:59,272 INFO L226 Difference]: Without dead ends: 52 [2022-03-15 21:26:59,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:26:59,273 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:59,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-15 21:26:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-03-15 21:26:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2022-03-15 21:26:59,278 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 11 [2022-03-15 21:26:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:59,278 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2022-03-15 21:26:59,278 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 21:26:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2022-03-15 21:26:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:26:59,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:59,279 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:59,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-15 21:26:59,491 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 21:26:59,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash 658198605, now seen corresponding path program 4 times [2022-03-15 21:26:59,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:59,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234035285] [2022-03-15 21:26:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:59,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:59,592 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 21:26:59,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:59,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234035285] [2022-03-15 21:26:59,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234035285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:59,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109250012] [2022-03-15 21:26:59,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:26:59,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:59,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:59,594 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 21:26:59,623 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 21:26:59,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:26:59,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:26:59,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:59,718 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 21:26:59,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:59,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109250012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:59,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:59,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-15 21:26:59,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [426511717] [2022-03-15 21:26:59,780 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:59,781 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:59,783 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 25 transitions. [2022-03-15 21:26:59,783 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:59,875 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1051#(or (< i2 N2) (< i1 N1)), 1050#(< i1 N1)] [2022-03-15 21:26:59,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:26:59,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:59,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:26:59,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:26:59,877 INFO L87 Difference]: Start difference. First operand 36 states and 78 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 21:26:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:59,966 INFO L93 Difference]: Finished difference Result 66 states and 121 transitions. [2022-03-15 21:26:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:26:59,966 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 11 [2022-03-15 21:26:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:59,967 INFO L225 Difference]: With dead ends: 66 [2022-03-15 21:26:59,967 INFO L226 Difference]: Without dead ends: 64 [2022-03-15 21:26:59,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:26:59,968 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:59,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-15 21:26:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2022-03-15 21:26:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 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 21:26:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 87 transitions. [2022-03-15 21:26:59,983 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 87 transitions. Word has length 11 [2022-03-15 21:26:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:59,983 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 87 transitions. [2022-03-15 21:26:59,983 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 21:26:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 87 transitions. [2022-03-15 21:26:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:26:59,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:59,984 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:00,013 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 21:27:00,199 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 21:27:00,200 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1665662955, now seen corresponding path program 5 times [2022-03-15 21:27:00,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:00,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097063969] [2022-03-15 21:27:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:00,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:00,238 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 21:27:00,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:00,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097063969] [2022-03-15 21:27:00,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097063969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:00,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672219245] [2022-03-15 21:27:00,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:00,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:00,240 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 21:27:00,261 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 21:27:00,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:27:00,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:27:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:00,360 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 21:27:00,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:00,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672219245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:00,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:00,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-03-15 21:27:00,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2055763063] [2022-03-15 21:27:00,425 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:00,426 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:00,428 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2022-03-15 21:27:00,428 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:00,454 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1276#(< i2 N2)] [2022-03-15 21:27:00,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:27:00,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:27:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:27:00,456 INFO L87 Difference]: Start difference. First operand 40 states and 87 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 21:27:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:00,542 INFO L93 Difference]: Finished difference Result 50 states and 99 transitions. [2022-03-15 21:27:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:27:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 21:27:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:00,543 INFO L225 Difference]: With dead ends: 50 [2022-03-15 21:27:00,543 INFO L226 Difference]: Without dead ends: 49 [2022-03-15 21:27:00,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:27:00,544 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:00,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-15 21:27:00,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2022-03-15 21:27:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.175) internal successors, (87), 40 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 21:27:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 87 transitions. [2022-03-15 21:27:00,548 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 87 transitions. Word has length 11 [2022-03-15 21:27:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:00,548 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 87 transitions. [2022-03-15 21:27:00,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 21:27:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 87 transitions. [2022-03-15 21:27:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:27:00,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:00,549 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:00,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 21:27:00,763 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 21:27:00,764 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:00,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1893958356, now seen corresponding path program 6 times [2022-03-15 21:27:00,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:00,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153076424] [2022-03-15 21:27:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:00,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:00,816 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 21:27:00,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:00,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153076424] [2022-03-15 21:27:00,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153076424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:00,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865287561] [2022-03-15 21:27:00,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:00,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:00,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:00,819 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 21:27:00,823 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 21:27:00,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:27:00,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:27:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:00,926 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 21:27:00,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:00,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865287561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:00,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:00,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-03-15 21:27:00,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1450336821] [2022-03-15 21:27:00,999 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:01,000 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:01,002 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2022-03-15 21:27:01,002 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:01,024 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1487#(< i1 N1)] [2022-03-15 21:27:01,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:27:01,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:01,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:27:01,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:27:01,025 INFO L87 Difference]: Start difference. First operand 41 states and 87 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:01,105 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2022-03-15 21:27:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:27:01,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 21:27:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:01,106 INFO L225 Difference]: With dead ends: 54 [2022-03-15 21:27:01,106 INFO L226 Difference]: Without dead ends: 52 [2022-03-15 21:27:01,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:27:01,107 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:01,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:27:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-15 21:27:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2022-03-15 21:27:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 84 transitions. [2022-03-15 21:27:01,110 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 84 transitions. Word has length 11 [2022-03-15 21:27:01,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:01,111 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 84 transitions. [2022-03-15 21:27:01,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 84 transitions. [2022-03-15 21:27:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:27:01,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:01,112 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:01,137 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 21:27:01,327 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 21:27:01,327 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1833214507, now seen corresponding path program 7 times [2022-03-15 21:27:01,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:01,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259665830] [2022-03-15 21:27:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:01,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:01,375 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 21:27:01,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:01,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259665830] [2022-03-15 21:27:01,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259665830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:01,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74733545] [2022-03-15 21:27:01,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:01,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:01,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:01,377 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 21:27:01,407 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 21:27:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:27:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:01,515 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 21:27:01,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:01,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74733545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:01,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:01,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-03-15 21:27:01,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1474566749] [2022-03-15 21:27:01,585 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:01,586 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:01,587 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2022-03-15 21:27:01,587 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:01,669 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1700#(or (< (+ i1 1) N1) (<= N1 i1)), 1701#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 1699#(< i1 N1)] [2022-03-15 21:27:01,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:27:01,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:27:01,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:27:01,670 INFO L87 Difference]: Start difference. First operand 39 states and 84 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 21:27:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:01,881 INFO L93 Difference]: Finished difference Result 71 states and 134 transitions. [2022-03-15 21:27:01,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:27:01,881 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 21:27:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:01,882 INFO L225 Difference]: With dead ends: 71 [2022-03-15 21:27:01,882 INFO L226 Difference]: Without dead ends: 71 [2022-03-15 21:27:01,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:27:01,883 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:01,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-15 21:27:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2022-03-15 21:27:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 45 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 102 transitions. [2022-03-15 21:27:01,887 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 102 transitions. Word has length 11 [2022-03-15 21:27:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:01,887 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 102 transitions. [2022-03-15 21:27:01,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 21:27:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 102 transitions. [2022-03-15 21:27:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:27:01,888 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:01,888 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:01,907 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 21:27:02,099 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 21:27:02,100 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:02,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:02,100 INFO L85 PathProgramCache]: Analyzing trace with hash -945710826, now seen corresponding path program 8 times [2022-03-15 21:27:02,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:02,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495663930] [2022-03-15 21:27:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:02,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:02,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:02,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495663930] [2022-03-15 21:27:02,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495663930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:02,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783506360] [2022-03-15 21:27:02,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:02,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:02,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:02,146 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 21:27:02,169 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 21:27:02,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:02,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:02,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:27:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:02,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:02,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783506360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:02,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:02,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-03-15 21:27:02,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1252132627] [2022-03-15 21:27:02,331 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:02,332 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:02,333 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 17 transitions. [2022-03-15 21:27:02,333 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:02,366 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1938#(< i1 N1), 1957#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:27:02,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:27:02,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:02,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:27:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:27:02,367 INFO L87 Difference]: Start difference. First operand 46 states and 102 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:02,474 INFO L93 Difference]: Finished difference Result 61 states and 122 transitions. [2022-03-15 21:27:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:27:02,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 21:27:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:02,475 INFO L225 Difference]: With dead ends: 61 [2022-03-15 21:27:02,475 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 21:27:02,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:27:02,476 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:02,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 21:27:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2022-03-15 21:27:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 108 transitions. [2022-03-15 21:27:02,479 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 108 transitions. Word has length 11 [2022-03-15 21:27:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:02,479 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 108 transitions. [2022-03-15 21:27:02,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 108 transitions. [2022-03-15 21:27:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:27:02,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:02,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:02,507 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 21:27:02,695 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 21:27:02,695 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:02,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:02,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1070702782, now seen corresponding path program 9 times [2022-03-15 21:27:02,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:02,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296820949] [2022-03-15 21:27:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:02,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:02,726 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 21:27:02,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:02,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296820949] [2022-03-15 21:27:02,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296820949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:02,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007526530] [2022-03-15 21:27:02,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:02,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:02,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:02,728 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 21:27:02,730 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 21:27:02,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 21:27:02,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:02,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:27:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:02,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:02,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-03-15 21:27:02,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:02,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-15 21:27:02,873 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 21:27:02,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:02,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:02,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-03-15 21:27:02,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:02,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-03-15 21:27:02,937 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 21:27:02,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007526530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:02,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:02,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 7 [2022-03-15 21:27:02,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1904412050] [2022-03-15 21:27:02,938 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:02,938 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:02,941 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2022-03-15 21:27:02,941 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:03,010 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:27:03,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:27:03,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:27:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:27:03,011 INFO L87 Difference]: Start difference. First operand 48 states and 108 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 21:27:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:03,049 INFO L93 Difference]: Finished difference Result 84 states and 176 transitions. [2022-03-15 21:27:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:27:03,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:27:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:03,051 INFO L225 Difference]: With dead ends: 84 [2022-03-15 21:27:03,051 INFO L226 Difference]: Without dead ends: 81 [2022-03-15 21:27:03,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:27:03,052 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:03,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:27:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-15 21:27:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2022-03-15 21:27:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.390625) internal successors, (153), 64 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 153 transitions. [2022-03-15 21:27:03,060 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 153 transitions. Word has length 12 [2022-03-15 21:27:03,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:03,060 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 153 transitions. [2022-03-15 21:27:03,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 21:27:03,061 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 153 transitions. [2022-03-15 21:27:03,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:27:03,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:03,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:03,091 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 21:27:03,287 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 21:27:03,287 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash -791552894, now seen corresponding path program 10 times [2022-03-15 21:27:03,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:03,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49490419] [2022-03-15 21:27:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:03,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:03,320 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 21:27:03,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:03,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49490419] [2022-03-15 21:27:03,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49490419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:03,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859468305] [2022-03-15 21:27:03,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:03,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:03,323 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 21:27:03,325 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 21:27:03,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:03,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:03,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:27:03,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:03,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:03,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 25 [2022-03-15 21:27:03,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:03,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-03-15 21:27:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:03,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:03,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:03,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2022-03-15 21:27:03,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:03,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-03-15 21:27:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:03,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859468305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:03,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:03,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2022-03-15 21:27:03,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [264468037] [2022-03-15 21:27:03,487 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:03,488 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:03,491 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2022-03-15 21:27:03,491 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:03,522 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2488#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:27:03,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:27:03,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:03,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:27:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:27:03,523 INFO L87 Difference]: Start difference. First operand 65 states and 153 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:03,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:03,561 INFO L93 Difference]: Finished difference Result 108 states and 238 transitions. [2022-03-15 21:27:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:27:03,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 21:27:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:03,563 INFO L225 Difference]: With dead ends: 108 [2022-03-15 21:27:03,563 INFO L226 Difference]: Without dead ends: 105 [2022-03-15 21:27:03,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:27:03,564 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:03,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:27:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-15 21:27:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2022-03-15 21:27:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.513157894736842) internal successors, (191), 76 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2022-03-15 21:27:03,572 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 12 [2022-03-15 21:27:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:03,574 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2022-03-15 21:27:03,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2022-03-15 21:27:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:27:03,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:03,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:03,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-15 21:27:03,795 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 21:27:03,795 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash 808456258, now seen corresponding path program 11 times [2022-03-15 21:27:03,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:03,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788221413] [2022-03-15 21:27:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:03,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:03,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:03,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788221413] [2022-03-15 21:27:03,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788221413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:03,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402025545] [2022-03-15 21:27:03,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:03,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:03,822 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 21:27:03,830 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 21:27:03,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:27:03,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:03,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:27:03,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:03,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:03,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-03-15 21:27:03,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:03,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-15 21:27:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:03,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:03,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:03,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-03-15 21:27:03,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:03,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-03-15 21:27:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:04,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402025545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:04,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:04,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 7 [2022-03-15 21:27:04,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [975782075] [2022-03-15 21:27:04,005 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:04,006 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:04,008 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2022-03-15 21:27:04,008 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:04,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:27:04,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:27:04,043 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:27:04,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:27:04,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:04,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:27:04,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:27:04,044 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:04,081 INFO L93 Difference]: Finished difference Result 111 states and 253 transitions. [2022-03-15 21:27:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:27:04,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:27:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:04,082 INFO L225 Difference]: With dead ends: 111 [2022-03-15 21:27:04,082 INFO L226 Difference]: Without dead ends: 108 [2022-03-15 21:27:04,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:27:04,088 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:04,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:27:04,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-15 21:27:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 84. [2022-03-15 21:27:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.602409638554217) internal successors, (216), 83 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 216 transitions. [2022-03-15 21:27:04,093 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 216 transitions. Word has length 12 [2022-03-15 21:27:04,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:04,094 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 216 transitions. [2022-03-15 21:27:04,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 216 transitions. [2022-03-15 21:27:04,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:27:04,095 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:04,095 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:04,121 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 21:27:04,309 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 21:27:04,309 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:04,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1741742185, now seen corresponding path program 12 times [2022-03-15 21:27:04,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:04,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911936697] [2022-03-15 21:27:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:04,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:04,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:04,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911936697] [2022-03-15 21:27:04,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911936697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:04,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583603829] [2022-03-15 21:27:04,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:04,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:04,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:04,357 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 21:27:04,375 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 21:27:04,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:27:04,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:27:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:04,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:04,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583603829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:04,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:04,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-15 21:27:04,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [419503621] [2022-03-15 21:27:04,539 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:04,540 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:04,541 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2022-03-15 21:27:04,541 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:04,611 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3185#(or (< i2 N2) (<= (+ N1 1) i1)), 3186#(or (< i2 N2) (<= N1 i1)), 3184#(< i2 N2)] [2022-03-15 21:27:04,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:27:04,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:04,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:27:04,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:27:04,612 INFO L87 Difference]: Start difference. First operand 84 states and 216 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:27:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:04,720 INFO L93 Difference]: Finished difference Result 117 states and 263 transitions. [2022-03-15 21:27:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:27:04,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:27:04,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:04,721 INFO L225 Difference]: With dead ends: 117 [2022-03-15 21:27:04,722 INFO L226 Difference]: Without dead ends: 114 [2022-03-15 21:27:04,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:27:04,722 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:04,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-15 21:27:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2022-03-15 21:27:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.5595238095238093) internal successors, (215), 84 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2022-03-15 21:27:04,726 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 12 [2022-03-15 21:27:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:04,726 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2022-03-15 21:27:04,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:27:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2022-03-15 21:27:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:04,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:04,727 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:04,755 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 21:27:04,927 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 21:27:04,927 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:04,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1167929069, now seen corresponding path program 13 times [2022-03-15 21:27:04,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:04,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751601283] [2022-03-15 21:27:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:04,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:04,996 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 21:27:04,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:04,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751601283] [2022-03-15 21:27:04,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751601283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:04,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080860216] [2022-03-15 21:27:04,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:04,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:04,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:04,998 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 21:27:04,999 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 21:27:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:05,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:05,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:05,149 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 21:27:05,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:05,225 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 21:27:05,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080860216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:05,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:05,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-15 21:27:05,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1876858032] [2022-03-15 21:27:05,226 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:05,227 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:05,229 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2022-03-15 21:27:05,229 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:05,366 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3575#(or (<= N2 (+ i2 1)) (< i1 N1)), 3573#(< i1 N1), 3574#(or (<= N2 i2) (< i1 N1))] [2022-03-15 21:27:05,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:27:05,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:05,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:27:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:27:05,367 INFO L87 Difference]: Start difference. First operand 85 states and 215 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 21:27:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:05,533 INFO L93 Difference]: Finished difference Result 135 states and 292 transitions. [2022-03-15 21:27:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:27:05,533 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 13 [2022-03-15 21:27:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:05,534 INFO L225 Difference]: With dead ends: 135 [2022-03-15 21:27:05,534 INFO L226 Difference]: Without dead ends: 128 [2022-03-15 21:27:05,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:27:05,535 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:05,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-15 21:27:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 83. [2022-03-15 21:27:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.5121951219512195) internal successors, (206), 82 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 206 transitions. [2022-03-15 21:27:05,539 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 206 transitions. Word has length 13 [2022-03-15 21:27:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:05,539 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 206 transitions. [2022-03-15 21:27:05,539 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 21:27:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 206 transitions. [2022-03-15 21:27:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:05,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:05,539 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:05,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 21:27:05,759 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 21:27:05,759 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:05,760 INFO L85 PathProgramCache]: Analyzing trace with hash -586774186, now seen corresponding path program 14 times [2022-03-15 21:27:05,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:05,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342361184] [2022-03-15 21:27:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:05,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:05,821 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 21:27:05,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:05,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342361184] [2022-03-15 21:27:05,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342361184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:05,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838689127] [2022-03-15 21:27:05,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:05,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:05,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:05,823 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 21:27:05,852 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 21:27:05,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:05,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:05,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:05,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:05,961 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 21:27:05,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:06,029 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 21:27:06,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838689127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:06,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:06,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-03-15 21:27:06,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1587695213] [2022-03-15 21:27:06,030 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:06,031 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:06,033 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2022-03-15 21:27:06,033 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:06,161 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3981#(< i1 N1), 3982#(or (< i2 N2) (< i1 N1)), 3983#(or (< i1 N1) (<= (+ 2 i2) N2))] [2022-03-15 21:27:06,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:27:06,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:27:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:27:06,163 INFO L87 Difference]: Start difference. First operand 83 states and 206 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 21:27:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:06,292 INFO L93 Difference]: Finished difference Result 132 states and 275 transitions. [2022-03-15 21:27:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:27:06,293 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 13 [2022-03-15 21:27:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:06,293 INFO L225 Difference]: With dead ends: 132 [2022-03-15 21:27:06,293 INFO L226 Difference]: Without dead ends: 126 [2022-03-15 21:27:06,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:27:06,294 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:06,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-15 21:27:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 83. [2022-03-15 21:27:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.4390243902439024) internal successors, (200), 82 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2022-03-15 21:27:06,298 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 13 [2022-03-15 21:27:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:06,298 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2022-03-15 21:27:06,298 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 21:27:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2022-03-15 21:27:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:06,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:06,299 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:06,320 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 21:27:06,515 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 21:27:06,515 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash -248407478, now seen corresponding path program 15 times [2022-03-15 21:27:06,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:06,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183797417] [2022-03-15 21:27:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:06,574 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 21:27:06,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:06,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183797417] [2022-03-15 21:27:06,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183797417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:06,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176629969] [2022-03-15 21:27:06,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:06,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:06,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:06,576 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 21:27:06,608 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 21:27:06,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:27:06,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:06,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:06,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:06,744 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 21:27:06,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:06,840 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 21:27:06,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176629969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:06,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:06,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-03-15 21:27:06,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1175885018] [2022-03-15 21:27:06,841 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:06,841 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:06,843 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 21:27:06,843 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:06,884 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4381#(< i2 N2)] [2022-03-15 21:27:06,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:27:06,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:27:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:27:06,885 INFO L87 Difference]: Start difference. First operand 83 states and 200 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 21:27:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:06,996 INFO L93 Difference]: Finished difference Result 101 states and 226 transitions. [2022-03-15 21:27:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:27:06,996 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 21:27:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:06,997 INFO L225 Difference]: With dead ends: 101 [2022-03-15 21:27:06,997 INFO L226 Difference]: Without dead ends: 100 [2022-03-15 21:27:06,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:27:06,998 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:06,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:27:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-15 21:27:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2022-03-15 21:27:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.426829268292683) internal successors, (199), 82 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 199 transitions. [2022-03-15 21:27:07,001 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 199 transitions. Word has length 13 [2022-03-15 21:27:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:07,001 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 199 transitions. [2022-03-15 21:27:07,001 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 21:27:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 199 transitions. [2022-03-15 21:27:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:07,002 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:07,002 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:07,026 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 21:27:07,219 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 21:27:07,220 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:07,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1231641005, now seen corresponding path program 16 times [2022-03-15 21:27:07,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:07,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652327401] [2022-03-15 21:27:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:07,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:07,262 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 21:27:07,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:07,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652327401] [2022-03-15 21:27:07,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652327401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:07,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035993350] [2022-03-15 21:27:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:07,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:07,264 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 21:27:07,269 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 21:27:07,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:07,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:07,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:07,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:07,411 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 21:27:07,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:07,514 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 21:27:07,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035993350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:07,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:07,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-03-15 21:27:07,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1719098982] [2022-03-15 21:27:07,515 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:07,515 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:07,517 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 21:27:07,517 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:07,547 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4750#(< i1 N1)] [2022-03-15 21:27:07,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:27:07,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:07,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:27:07,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:27:07,548 INFO L87 Difference]: Start difference. First operand 83 states and 199 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 21:27:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:07,647 INFO L93 Difference]: Finished difference Result 121 states and 251 transitions. [2022-03-15 21:27:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:27:07,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 21:27:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:07,648 INFO L225 Difference]: With dead ends: 121 [2022-03-15 21:27:07,648 INFO L226 Difference]: Without dead ends: 119 [2022-03-15 21:27:07,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:27:07,649 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:07,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-15 21:27:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 84. [2022-03-15 21:27:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.4216867469879517) internal successors, (201), 83 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 201 transitions. [2022-03-15 21:27:07,653 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 201 transitions. Word has length 13 [2022-03-15 21:27:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:07,653 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 201 transitions. [2022-03-15 21:27:07,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 21:27:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 201 transitions. [2022-03-15 21:27:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:07,653 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:07,653 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:07,671 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 21:27:07,860 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 21:27:07,860 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:07,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:07,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1292384854, now seen corresponding path program 17 times [2022-03-15 21:27:07,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:07,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109357456] [2022-03-15 21:27:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:07,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:07,924 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 21:27:07,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:07,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109357456] [2022-03-15 21:27:07,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109357456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:07,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675817050] [2022-03-15 21:27:07,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:07,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:07,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:07,926 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 21:27:07,956 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 21:27:07,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:27:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:08,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:08,176 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 21:27:08,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675817050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:08,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:08,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-03-15 21:27:08,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1978679102] [2022-03-15 21:27:08,177 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:08,178 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:08,179 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 21:27:08,179 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:08,258 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [5139#(or (< (+ i1 1) N1) (<= N1 i1)), 5140#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 5138#(< i1 N1)] [2022-03-15 21:27:08,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:27:08,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:08,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:27:08,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:27:08,259 INFO L87 Difference]: Start difference. First operand 84 states and 201 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 21:27:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:08,481 INFO L93 Difference]: Finished difference Result 123 states and 254 transitions. [2022-03-15 21:27:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:27:08,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 21:27:08,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:08,482 INFO L225 Difference]: With dead ends: 123 [2022-03-15 21:27:08,482 INFO L226 Difference]: Without dead ends: 121 [2022-03-15 21:27:08,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:27:08,483 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:08,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-15 21:27:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2022-03-15 21:27:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.4146341463414633) internal successors, (198), 82 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 198 transitions. [2022-03-15 21:27:08,487 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 198 transitions. Word has length 13 [2022-03-15 21:27:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:08,487 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 198 transitions. [2022-03-15 21:27:08,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 21:27:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 198 transitions. [2022-03-15 21:27:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:08,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:08,488 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:08,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-15 21:27:08,688 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 21:27:08,688 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2115078761, now seen corresponding path program 18 times [2022-03-15 21:27:08,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:08,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933267146] [2022-03-15 21:27:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:08,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:08,747 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 21:27:08,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:08,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933267146] [2022-03-15 21:27:08,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933267146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:08,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469409125] [2022-03-15 21:27:08,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:08,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:08,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:08,749 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 21:27:08,758 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 21:27:08,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:27:08,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:08,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:08,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:08,905 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 21:27:08,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:09,019 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 21:27:09,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469409125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:09,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:09,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-03-15 21:27:09,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [600067399] [2022-03-15 21:27:09,020 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:09,021 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:09,022 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2022-03-15 21:27:09,022 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:09,061 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5512#(< i1 N1), 5539#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:27:09,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:27:09,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:27:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:27:09,064 INFO L87 Difference]: Start difference. First operand 83 states and 198 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 21:27:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:09,184 INFO L93 Difference]: Finished difference Result 122 states and 249 transitions. [2022-03-15 21:27:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:27:09,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 21:27:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:09,185 INFO L225 Difference]: With dead ends: 122 [2022-03-15 21:27:09,185 INFO L226 Difference]: Without dead ends: 122 [2022-03-15 21:27:09,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:27:09,186 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:09,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:09,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-15 21:27:09,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 79. [2022-03-15 21:27:09,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.358974358974359) internal successors, (184), 78 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 184 transitions. [2022-03-15 21:27:09,192 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 184 transitions. Word has length 13 [2022-03-15 21:27:09,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:09,192 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 184 transitions. [2022-03-15 21:27:09,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 21:27:09,192 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 184 transitions. [2022-03-15 21:27:09,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:09,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:09,194 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:09,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:09,409 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 21:27:09,409 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:09,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:09,410 INFO L85 PathProgramCache]: Analyzing trace with hash -783287691, now seen corresponding path program 19 times [2022-03-15 21:27:09,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:09,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463880179] [2022-03-15 21:27:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:09,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:09,463 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 21:27:09,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:09,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463880179] [2022-03-15 21:27:09,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463880179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:09,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256055352] [2022-03-15 21:27:09,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:09,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:09,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:09,465 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 21:27:09,493 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 21:27:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:09,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:09,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:09,604 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 21:27:09,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:09,678 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 21:27:09,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256055352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:09,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:09,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-03-15 21:27:09,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1084558741] [2022-03-15 21:27:09,678 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:09,679 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:09,680 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2022-03-15 21:27:09,681 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:09,732 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5919#(< i1 N1), 5920#(or (<= N2 i2) (< i1 N1))] [2022-03-15 21:27:09,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:27:09,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:27:09,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:27:09,734 INFO L87 Difference]: Start difference. First operand 79 states and 184 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 21:27:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:09,842 INFO L93 Difference]: Finished difference Result 102 states and 211 transitions. [2022-03-15 21:27:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:27:09,843 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 21:27:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:09,843 INFO L225 Difference]: With dead ends: 102 [2022-03-15 21:27:09,844 INFO L226 Difference]: Without dead ends: 98 [2022-03-15 21:27:09,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:27:09,844 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:09,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-15 21:27:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2022-03-15 21:27:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.3783783783783785) internal successors, (176), 74 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 176 transitions. [2022-03-15 21:27:09,847 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 176 transitions. Word has length 13 [2022-03-15 21:27:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:09,847 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 176 transitions. [2022-03-15 21:27:09,848 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 21:27:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 176 transitions. [2022-03-15 21:27:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:09,848 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:09,848 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:09,870 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 21:27:10,062 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 21:27:10,063 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:10,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1099771628, now seen corresponding path program 20 times [2022-03-15 21:27:10,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:10,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539825984] [2022-03-15 21:27:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:10,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:10,118 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 21:27:10,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:10,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539825984] [2022-03-15 21:27:10,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539825984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:10,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407337018] [2022-03-15 21:27:10,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:10,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:10,120 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 21:27:10,125 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 21:27:10,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:10,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:10,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:10,269 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 21:27:10,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:10,362 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 21:27:10,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407337018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:10,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:10,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-03-15 21:27:10,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1735857092] [2022-03-15 21:27:10,362 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:10,363 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:10,364 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2022-03-15 21:27:10,364 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:10,413 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [6273#(< i1 N1), 6274#(or (< i2 N2) (< i1 N1))] [2022-03-15 21:27:10,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:27:10,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:10,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:27:10,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:27:10,414 INFO L87 Difference]: Start difference. First operand 75 states and 176 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 21:27:10,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:10,491 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2022-03-15 21:27:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:27:10,491 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 21:27:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:10,492 INFO L225 Difference]: With dead ends: 118 [2022-03-15 21:27:10,492 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 21:27:10,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:27:10,492 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:10,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:10,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 21:27:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2022-03-15 21:27:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.41025641025641) internal successors, (188), 78 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 188 transitions. [2022-03-15 21:27:10,496 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 188 transitions. Word has length 13 [2022-03-15 21:27:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:10,496 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 188 transitions. [2022-03-15 21:27:10,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 21:27:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 188 transitions. [2022-03-15 21:27:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:10,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:10,496 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:10,518 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 21:27:10,717 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 21:27:10,718 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:10,718 INFO L85 PathProgramCache]: Analyzing trace with hash -707682835, now seen corresponding path program 21 times [2022-03-15 21:27:10,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:10,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434334751] [2022-03-15 21:27:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:10,766 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 21:27:10,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:10,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434334751] [2022-03-15 21:27:10,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434334751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:10,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927921226] [2022-03-15 21:27:10,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:10,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:10,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:10,768 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 21:27:10,769 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 21:27:10,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:27:10,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:10,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:10,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:10,918 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 21:27:10,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:11,015 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 21:27:11,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927921226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:11,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:11,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-03-15 21:27:11,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [385490502] [2022-03-15 21:27:11,015 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:11,016 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:11,017 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2022-03-15 21:27:11,017 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:11,035 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6646#(< i1 N1)] [2022-03-15 21:27:11,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:27:11,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:11,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:27:11,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:27:11,036 INFO L87 Difference]: Start difference. First operand 79 states and 188 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 21:27:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:11,149 INFO L93 Difference]: Finished difference Result 109 states and 235 transitions. [2022-03-15 21:27:11,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:27:11,150 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 21:27:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:11,150 INFO L225 Difference]: With dead ends: 109 [2022-03-15 21:27:11,151 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 21:27:11,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:27:11,151 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:11,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 21:27:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2022-03-15 21:27:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.4814814814814814) internal successors, (201), 81 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2022-03-15 21:27:11,155 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 13 [2022-03-15 21:27:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:11,155 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2022-03-15 21:27:11,155 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 21:27:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2022-03-15 21:27:11,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:11,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:11,155 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:11,182 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 21:27:11,356 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 21:27:11,356 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash -646938986, now seen corresponding path program 22 times [2022-03-15 21:27:11,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:11,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806927433] [2022-03-15 21:27:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:11,411 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 21:27:11,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:11,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806927433] [2022-03-15 21:27:11,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806927433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:11,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861439810] [2022-03-15 21:27:11,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:11,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:11,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:11,413 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 21:27:11,439 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 21:27:11,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:11,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:11,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:11,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:11,566 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 21:27:11,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:11,674 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 21:27:11,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861439810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:11,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:11,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-03-15 21:27:11,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1119660937] [2022-03-15 21:27:11,675 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:11,676 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:11,677 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 21:27:11,677 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:11,759 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [7025#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 7022#(< i1 N1), 7024#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 7023#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:27:11,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:27:11,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:11,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:27:11,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:27:11,761 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:12,061 INFO L93 Difference]: Finished difference Result 143 states and 295 transitions. [2022-03-15 21:27:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:27:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 21:27:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:12,062 INFO L225 Difference]: With dead ends: 143 [2022-03-15 21:27:12,062 INFO L226 Difference]: Without dead ends: 143 [2022-03-15 21:27:12,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:27:12,063 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:12,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-15 21:27:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 90. [2022-03-15 21:27:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.50561797752809) internal successors, (223), 89 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 223 transitions. [2022-03-15 21:27:12,067 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 223 transitions. Word has length 13 [2022-03-15 21:27:12,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:12,067 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 223 transitions. [2022-03-15 21:27:12,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 223 transitions. [2022-03-15 21:27:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:12,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:12,067 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:12,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:12,279 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 21:27:12,279 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:12,280 INFO L85 PathProgramCache]: Analyzing trace with hash 240564695, now seen corresponding path program 23 times [2022-03-15 21:27:12,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:12,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421224913] [2022-03-15 21:27:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:12,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:12,338 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 21:27:12,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:12,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421224913] [2022-03-15 21:27:12,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421224913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:12,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061215083] [2022-03-15 21:27:12,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:12,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:12,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:12,339 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 21:27:12,360 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 21:27:12,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:27:12,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:12,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:12,484 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 21:27:12,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:12,573 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 21:27:12,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061215083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:12,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:12,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-03-15 21:27:12,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1697603323] [2022-03-15 21:27:12,573 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:12,574 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:12,575 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 19 transitions. [2022-03-15 21:27:12,575 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:12,614 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [7468#(or (< (+ i1 1) N1) (<= N1 i1)), 7441#(< i1 N1)] [2022-03-15 21:27:12,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:27:12,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:12,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:27:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:27:12,616 INFO L87 Difference]: Start difference. First operand 90 states and 223 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:27:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:12,697 INFO L93 Difference]: Finished difference Result 109 states and 241 transitions. [2022-03-15 21:27:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:27:12,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:27:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:12,697 INFO L225 Difference]: With dead ends: 109 [2022-03-15 21:27:12,698 INFO L226 Difference]: Without dead ends: 109 [2022-03-15 21:27:12,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:27:12,698 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:12,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:27:12,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-15 21:27:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2022-03-15 21:27:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.4761904761904763) internal successors, (208), 84 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 208 transitions. [2022-03-15 21:27:12,702 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 208 transitions. Word has length 13 [2022-03-15 21:27:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:12,702 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 208 transitions. [2022-03-15 21:27:12,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 21:27:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 208 transitions. [2022-03-15 21:27:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:27:12,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:12,702 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:12,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-15 21:27:12,911 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 21:27:12,912 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1095871349, now seen corresponding path program 24 times [2022-03-15 21:27:12,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:12,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699199981] [2022-03-15 21:27:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:12,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:12,986 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 21:27:12,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:12,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699199981] [2022-03-15 21:27:12,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699199981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:12,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699907776] [2022-03-15 21:27:12,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:12,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:12,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:12,988 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 21:27:12,990 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 21:27:13,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:27:13,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:13,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:27:13,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:13,127 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 21:27:13,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:13,231 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 21:27:13,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699907776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:13,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:13,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-03-15 21:27:13,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [258453755] [2022-03-15 21:27:13,232 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:13,233 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:13,234 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2022-03-15 21:27:13,234 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:13,291 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [7847#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 7846#(or (< (+ i1 1) N1) (<= N1 i1)), 7819#(< i1 N1)] [2022-03-15 21:27:13,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:27:13,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:13,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:27:13,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:27:13,292 INFO L87 Difference]: Start difference. First operand 85 states and 208 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:13,450 INFO L93 Difference]: Finished difference Result 108 states and 238 transitions. [2022-03-15 21:27:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:27:13,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 21:27:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:13,451 INFO L225 Difference]: With dead ends: 108 [2022-03-15 21:27:13,451 INFO L226 Difference]: Without dead ends: 108 [2022-03-15 21:27:13,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:27:13,452 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:13,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-15 21:27:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2022-03-15 21:27:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.4942528735632186) internal successors, (217), 87 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 217 transitions. [2022-03-15 21:27:13,455 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 217 transitions. Word has length 13 [2022-03-15 21:27:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:13,455 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 217 transitions. [2022-03-15 21:27:13,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 217 transitions. [2022-03-15 21:27:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:27:13,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:13,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:13,480 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 21:27:13,656 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 21:27:13,656 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:13,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1010153639, now seen corresponding path program 25 times [2022-03-15 21:27:13,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:13,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949486041] [2022-03-15 21:27:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:13,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:13,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:13,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949486041] [2022-03-15 21:27:13,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949486041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:13,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009485306] [2022-03-15 21:27:13,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:13,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:13,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:13,688 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 21:27:13,714 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 21:27:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:13,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:27:13,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:13,765 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-15 21:27:13,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 21:27:13,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:13,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-03-15 21:27:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:13,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:14,036 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-15 21:27:14,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-03-15 21:27:14,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:14,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-03-15 21:27:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:14,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009485306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:14,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:14,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2022-03-15 21:27:14,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1804536494] [2022-03-15 21:27:14,072 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:14,073 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:14,075 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2022-03-15 21:27:14,075 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:14,172 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:27:14,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:27:14,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:27:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:27:14,173 INFO L87 Difference]: Start difference. First operand 88 states and 217 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 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 21:27:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:14,225 INFO L93 Difference]: Finished difference Result 138 states and 311 transitions. [2022-03-15 21:27:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:27:14,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 21:27:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:14,226 INFO L225 Difference]: With dead ends: 138 [2022-03-15 21:27:14,226 INFO L226 Difference]: Without dead ends: 135 [2022-03-15 21:27:14,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:27:14,227 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:14,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:27:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-15 21:27:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2022-03-15 21:27:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.5225225225225225) internal successors, (280), 111 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 280 transitions. [2022-03-15 21:27:14,230 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 280 transitions. Word has length 14 [2022-03-15 21:27:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:14,230 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 280 transitions. [2022-03-15 21:27:14,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 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 21:27:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 280 transitions. [2022-03-15 21:27:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:27:14,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:14,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:14,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 21:27:14,447 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 21:27:14,447 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:14,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:14,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1805827, now seen corresponding path program 26 times [2022-03-15 21:27:14,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:14,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363558621] [2022-03-15 21:27:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:14,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:27:14,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:14,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363558621] [2022-03-15 21:27:14,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363558621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:14,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137927541] [2022-03-15 21:27:14,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:14,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:14,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:14,476 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 21:27:14,477 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 21:27:14,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:14,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:14,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:27:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:14,574 INFO L353 Elim1Store]: treesize reduction 37, result has 44.8 percent of original size [2022-03-15 21:27:14,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 52 [2022-03-15 21:27:14,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:14,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-03-15 21:27:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:14,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:14,733 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-15 21:27:14,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 54 [2022-03-15 21:27:14,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:14,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2022-03-15 21:27:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:14,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137927541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:14,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:14,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2022-03-15 21:27:14,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [142343337] [2022-03-15 21:27:14,774 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:14,775 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:14,777 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 24 transitions. [2022-03-15 21:27:14,777 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:14,829 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8692#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:27:14,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:27:14,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:14,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:27:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:27:14,830 INFO L87 Difference]: Start difference. First operand 112 states and 280 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 21:27:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:14,891 INFO L93 Difference]: Finished difference Result 181 states and 418 transitions. [2022-03-15 21:27:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:27:14,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 21:27:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:14,893 INFO L225 Difference]: With dead ends: 181 [2022-03-15 21:27:14,893 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 21:27:14,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:27:14,894 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:14,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 21:27:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2022-03-15 21:27:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.6315789473684212) internal successors, (350), 133 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 350 transitions. [2022-03-15 21:27:14,898 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 350 transitions. Word has length 14 [2022-03-15 21:27:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:14,899 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 350 transitions. [2022-03-15 21:27:14,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 21:27:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 350 transitions. [2022-03-15 21:27:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:27:14,899 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:14,899 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:14,920 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 21:27:15,115 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 21:27:15,115 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1082211359, now seen corresponding path program 27 times [2022-03-15 21:27:15,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:15,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277920261] [2022-03-15 21:27:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:15,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:27:15,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:15,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277920261] [2022-03-15 21:27:15,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277920261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:15,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766436291] [2022-03-15 21:27:15,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:15,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:15,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:15,158 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 21:27:15,171 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 21:27:15,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:27:15,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:15,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:27:15,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:15,280 INFO L353 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2022-03-15 21:27:15,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 59 [2022-03-15 21:27:15,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:15,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 50 [2022-03-15 21:27:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:15,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:15,420 INFO L353 Elim1Store]: treesize reduction 60, result has 25.9 percent of original size [2022-03-15 21:27:15,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 76 [2022-03-15 21:27:15,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:15,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 56 [2022-03-15 21:27:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:15,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766436291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:15,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:15,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-03-15 21:27:15,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1005797713] [2022-03-15 21:27:15,449 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:15,450 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:15,451 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 24 transitions. [2022-03-15 21:27:15,451 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:15,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9214#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 9210#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:27:15,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:27:15,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:15,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:27:15,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:27:15,483 INFO L87 Difference]: Start difference. First operand 134 states and 350 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 21:27:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:15,556 INFO L93 Difference]: Finished difference Result 197 states and 471 transitions. [2022-03-15 21:27:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:27:15,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 14 [2022-03-15 21:27:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:15,558 INFO L225 Difference]: With dead ends: 197 [2022-03-15 21:27:15,558 INFO L226 Difference]: Without dead ends: 194 [2022-03-15 21:27:15,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:27:15,558 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:15,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:15,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-03-15 21:27:15,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 149. [2022-03-15 21:27:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.7094594594594597) internal successors, (401), 148 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 401 transitions. [2022-03-15 21:27:15,563 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 401 transitions. Word has length 14 [2022-03-15 21:27:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:15,563 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 401 transitions. [2022-03-15 21:27:15,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 21:27:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 401 transitions. [2022-03-15 21:27:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:27:15,564 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:15,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:15,588 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 21:27:15,783 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 21:27:15,783 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash -327005757, now seen corresponding path program 28 times [2022-03-15 21:27:15,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:15,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029751067] [2022-03-15 21:27:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:15,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:15,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:15,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029751067] [2022-03-15 21:27:15,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029751067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:15,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737010397] [2022-03-15 21:27:15,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:15,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:15,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:15,826 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 21:27:15,839 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 21:27:15,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:15,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:15,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:27:15,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:15,896 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-15 21:27:15,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-03-15 21:27:16,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:16,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-03-15 21:27:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:16,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:16,131 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-15 21:27:16,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-03-15 21:27:16,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:16,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-03-15 21:27:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:16,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737010397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:16,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:16,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2022-03-15 21:27:16,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1222775071] [2022-03-15 21:27:16,162 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:16,163 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:16,164 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 24 transitions. [2022-03-15 21:27:16,164 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:16,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:27:16,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:27:16,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:27:16,211 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:27:16,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:27:16,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:27:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:27:16,212 INFO L87 Difference]: Start difference. First operand 149 states and 401 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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 21:27:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:16,275 INFO L93 Difference]: Finished difference Result 199 states and 489 transitions. [2022-03-15 21:27:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:27:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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 14 [2022-03-15 21:27:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:16,277 INFO L225 Difference]: With dead ends: 199 [2022-03-15 21:27:16,278 INFO L226 Difference]: Without dead ends: 196 [2022-03-15 21:27:16,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:27:16,278 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:16,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-15 21:27:16,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 160. [2022-03-15 21:27:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.748427672955975) internal successors, (437), 159 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 437 transitions. [2022-03-15 21:27:16,284 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 437 transitions. Word has length 14 [2022-03-15 21:27:16,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:16,284 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 437 transitions. [2022-03-15 21:27:16,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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 21:27:16,284 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 437 transitions. [2022-03-15 21:27:16,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:27:16,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:16,285 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:16,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 21:27:16,499 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 21:27:16,499 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2132501702, now seen corresponding path program 29 times [2022-03-15 21:27:16,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:16,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886796643] [2022-03-15 21:27:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:16,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:16,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:16,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886796643] [2022-03-15 21:27:16,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886796643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:16,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95541402] [2022-03-15 21:27:16,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:16,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:16,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:16,556 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 21:27:16,557 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 21:27:16,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:27:16,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:27:16,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:16,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:16,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95541402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:16,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:16,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 21:27:16,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [168019061] [2022-03-15 21:27:16,752 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:16,753 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:16,755 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 21:27:16,755 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:16,842 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [10441#(or (< i2 N2) (<= N1 i1)), 10440#(or (< i2 N2) (<= (+ N1 1) i1)), 10439#(< i2 N2), 10442#(or (<= N1 (+ i1 1)) (< i2 N2))] [2022-03-15 21:27:16,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:27:16,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:27:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:27:16,842 INFO L87 Difference]: Start difference. First operand 160 states and 437 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:16,973 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2022-03-15 21:27:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:27:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 21:27:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:16,974 INFO L225 Difference]: With dead ends: 222 [2022-03-15 21:27:16,974 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 21:27:16,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:27:16,975 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:16,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:16,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 21:27:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 149. [2022-03-15 21:27:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.7027027027027026) internal successors, (400), 148 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 400 transitions. [2022-03-15 21:27:16,980 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 400 transitions. Word has length 14 [2022-03-15 21:27:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:16,980 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 400 transitions. [2022-03-15 21:27:16,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 400 transitions. [2022-03-15 21:27:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:16,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:16,981 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:17,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-15 21:27:17,195 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 21:27:17,195 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1250014794, now seen corresponding path program 30 times [2022-03-15 21:27:17,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:17,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161149355] [2022-03-15 21:27:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:17,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:17,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:17,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161149355] [2022-03-15 21:27:17,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161149355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:17,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429181040] [2022-03-15 21:27:17,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:17,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:17,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:17,264 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 21:27:17,292 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 21:27:17,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:27:17,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:17,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:17,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:17,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429181040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:17,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:17,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 21:27:17,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [248958895] [2022-03-15 21:27:17,526 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:17,528 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:17,530 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 43 transitions. [2022-03-15 21:27:17,530 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:17,710 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [11085#(or (<= N2 (+ i2 1)) (< i1 N1)), 11084#(or (<= N2 i2) (< i1 N1)), 11086#(or (< i1 N1) (<= N2 (+ 2 i2))), 11083#(< i1 N1)] [2022-03-15 21:27:17,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:27:17,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:27:17,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:27:17,711 INFO L87 Difference]: Start difference. First operand 149 states and 400 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 21:27:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:17,935 INFO L93 Difference]: Finished difference Result 239 states and 543 transitions. [2022-03-15 21:27:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:27:17,935 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 15 [2022-03-15 21:27:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:17,936 INFO L225 Difference]: With dead ends: 239 [2022-03-15 21:27:17,936 INFO L226 Difference]: Without dead ends: 230 [2022-03-15 21:27:17,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:27:17,937 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:17,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-15 21:27:17,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 152. [2022-03-15 21:27:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.615894039735099) internal successors, (395), 151 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 395 transitions. [2022-03-15 21:27:17,942 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 395 transitions. Word has length 15 [2022-03-15 21:27:17,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:17,942 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 395 transitions. [2022-03-15 21:27:17,942 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 21:27:17,942 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 395 transitions. [2022-03-15 21:27:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:17,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:17,942 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:17,962 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 21:27:18,155 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 21:27:18,155 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash 188759149, now seen corresponding path program 31 times [2022-03-15 21:27:18,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:18,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583885843] [2022-03-15 21:27:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:18,243 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 21:27:18,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:18,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583885843] [2022-03-15 21:27:18,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583885843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:18,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474119055] [2022-03-15 21:27:18,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:18,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:18,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:18,244 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 21:27:18,245 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 21:27:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:18,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:18,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:18,389 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 21:27:18,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:18,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474119055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:18,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:18,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-15 21:27:18,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1310568528] [2022-03-15 21:27:18,480 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:18,481 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:18,484 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 41 transitions. [2022-03-15 21:27:18,484 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:18,652 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [11756#(or (< i2 N2) (< i1 N1)), 11757#(or (< i1 N1) (<= (+ 2 i2) N2)), 11758#(or (< i1 N1) (<= (+ 3 i2) N2)), 11755#(< i1 N1)] [2022-03-15 21:27:18,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:27:18,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:18,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:27:18,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:27:18,653 INFO L87 Difference]: Start difference. First operand 152 states and 395 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 21:27:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:18,791 INFO L93 Difference]: Finished difference Result 220 states and 492 transitions. [2022-03-15 21:27:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:27:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 15 [2022-03-15 21:27:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:18,792 INFO L225 Difference]: With dead ends: 220 [2022-03-15 21:27:18,792 INFO L226 Difference]: Without dead ends: 210 [2022-03-15 21:27:18,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:27:18,793 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:18,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-15 21:27:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2022-03-15 21:27:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.563758389261745) internal successors, (382), 149 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:18,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 382 transitions. [2022-03-15 21:27:18,797 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 382 transitions. Word has length 15 [2022-03-15 21:27:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:18,797 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 382 transitions. [2022-03-15 21:27:18,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 21:27:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 382 transitions. [2022-03-15 21:27:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:18,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:18,798 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:18,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-15 21:27:19,019 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 21:27:19,019 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:19,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1259935435, now seen corresponding path program 32 times [2022-03-15 21:27:19,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:19,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919640545] [2022-03-15 21:27:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:19,074 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 21:27:19,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:19,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919640545] [2022-03-15 21:27:19,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919640545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:19,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960473218] [2022-03-15 21:27:19,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:19,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:19,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:19,075 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 21:27:19,076 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 21:27:19,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:19,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:19,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:19,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:19,216 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 21:27:19,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:19,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960473218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:19,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:19,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2022-03-15 21:27:19,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1601213012] [2022-03-15 21:27:19,333 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:19,334 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:19,336 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:27:19,336 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:19,380 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12399#(< i2 N2)] [2022-03-15 21:27:19,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:27:19,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:19,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:27:19,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:27:19,381 INFO L87 Difference]: Start difference. First operand 150 states and 382 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 21:27:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:19,527 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2022-03-15 21:27:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:27:19,527 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 21:27:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:19,528 INFO L225 Difference]: With dead ends: 177 [2022-03-15 21:27:19,528 INFO L226 Difference]: Without dead ends: 176 [2022-03-15 21:27:19,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:27:19,529 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:19,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:19,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-15 21:27:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 150. [2022-03-15 21:27:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.557046979865772) internal successors, (381), 149 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 381 transitions. [2022-03-15 21:27:19,533 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 381 transitions. Word has length 15 [2022-03-15 21:27:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:19,533 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 381 transitions. [2022-03-15 21:27:19,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 21:27:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 381 transitions. [2022-03-15 21:27:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:19,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:19,534 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:19,557 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 21:27:19,754 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 21:27:19,754 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:19,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:19,755 INFO L85 PathProgramCache]: Analyzing trace with hash 55957580, now seen corresponding path program 33 times [2022-03-15 21:27:19,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:19,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6021000] [2022-03-15 21:27:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:19,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:19,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:19,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6021000] [2022-03-15 21:27:19,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6021000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:19,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770788789] [2022-03-15 21:27:19,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:19,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:19,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:19,810 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 21:27:19,818 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 21:27:19,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:27:19,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:19,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:19,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:19,985 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 21:27:19,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:20,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770788789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:20,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:20,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2022-03-15 21:27:20,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1497999320] [2022-03-15 21:27:20,106 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:20,107 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:20,108 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:27:20,108 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:20,145 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13001#(< i1 N1)] [2022-03-15 21:27:20,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:27:20,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:20,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:27:20,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:27:20,146 INFO L87 Difference]: Start difference. First operand 150 states and 381 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 21:27:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:20,258 INFO L93 Difference]: Finished difference Result 212 states and 469 transitions. [2022-03-15 21:27:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:27:20,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 15 [2022-03-15 21:27:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:20,259 INFO L225 Difference]: With dead ends: 212 [2022-03-15 21:27:20,259 INFO L226 Difference]: Without dead ends: 210 [2022-03-15 21:27:20,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:27:20,260 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 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 21:27:20,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-15 21:27:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2022-03-15 21:27:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5460526315789473) internal successors, (387), 152 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 387 transitions. [2022-03-15 21:27:20,264 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 387 transitions. Word has length 15 [2022-03-15 21:27:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:20,265 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 387 transitions. [2022-03-15 21:27:20,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 21:27:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 387 transitions. [2022-03-15 21:27:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:20,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:20,265 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:20,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 21:27:20,487 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 21:27:20,487 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash 116701429, now seen corresponding path program 34 times [2022-03-15 21:27:20,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:20,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039739886] [2022-03-15 21:27:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:20,545 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 21:27:20,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:20,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039739886] [2022-03-15 21:27:20,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039739886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:20,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443052515] [2022-03-15 21:27:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:20,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:20,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:20,547 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 21:27:20,548 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 21:27:20,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:20,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:20,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:20,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:20,729 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 21:27:20,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:20,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443052515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:20,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:20,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2022-03-15 21:27:20,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1452068394] [2022-03-15 21:27:20,869 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:20,869 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:20,871 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:27:20,871 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:20,943 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [13639#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 13637#(< i1 N1), 13638#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:27:20,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:27:20,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:20,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:27:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:27:20,944 INFO L87 Difference]: Start difference. First operand 153 states and 387 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 21:27:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:21,256 INFO L93 Difference]: Finished difference Result 229 states and 506 transitions. [2022-03-15 21:27:21,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:27:21,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 21:27:21,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:21,257 INFO L225 Difference]: With dead ends: 229 [2022-03-15 21:27:21,257 INFO L226 Difference]: Without dead ends: 227 [2022-03-15 21:27:21,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=1211, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:27:21,258 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:21,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-15 21:27:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 158. [2022-03-15 21:27:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.56687898089172) internal successors, (403), 157 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 403 transitions. [2022-03-15 21:27:21,264 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 403 transitions. Word has length 15 [2022-03-15 21:27:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:21,264 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 403 transitions. [2022-03-15 21:27:21,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 21:27:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 403 transitions. [2022-03-15 21:27:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:21,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:21,265 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:21,287 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 21:27:21,479 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 21:27:21,479 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:21,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:21,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1004205110, now seen corresponding path program 35 times [2022-03-15 21:27:21,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:21,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026403786] [2022-03-15 21:27:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:21,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:21,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:21,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026403786] [2022-03-15 21:27:21,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026403786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:21,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345665305] [2022-03-15 21:27:21,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:21,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:21,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:21,548 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 21:27:21,556 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 21:27:21,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:27:21,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:21,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:21,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:21,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345665305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:21,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:21,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2022-03-15 21:27:21,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1957091625] [2022-03-15 21:27:21,827 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:21,827 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:21,829 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2022-03-15 21:27:21,829 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:21,872 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [14321#(or (< (+ i1 1) N1) (<= N1 i1)), 14286#(< i1 N1)] [2022-03-15 21:27:21,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:27:21,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:21,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:27:21,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:27:21,873 INFO L87 Difference]: Start difference. First operand 158 states and 403 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 21:27:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:22,007 INFO L93 Difference]: Finished difference Result 221 states and 491 transitions. [2022-03-15 21:27:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:27:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 15 [2022-03-15 21:27:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:22,008 INFO L225 Difference]: With dead ends: 221 [2022-03-15 21:27:22,008 INFO L226 Difference]: Without dead ends: 221 [2022-03-15 21:27:22,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:27:22,009 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:22,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-15 21:27:22,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 160. [2022-03-15 21:27:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.5723270440251573) internal successors, (409), 159 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 409 transitions. [2022-03-15 21:27:22,023 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 409 transitions. Word has length 15 [2022-03-15 21:27:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:22,023 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 409 transitions. [2022-03-15 21:27:22,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 21:27:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 409 transitions. [2022-03-15 21:27:22,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:22,023 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:22,023 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:22,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 21:27:22,227 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 21:27:22,227 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:22,228 INFO L85 PathProgramCache]: Analyzing trace with hash 811163182, now seen corresponding path program 36 times [2022-03-15 21:27:22,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:22,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752290069] [2022-03-15 21:27:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:22,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:22,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:22,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752290069] [2022-03-15 21:27:22,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752290069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:22,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131104355] [2022-03-15 21:27:22,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:22,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:22,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:22,280 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 21:27:22,280 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 21:27:22,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:27:22,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:22,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:22,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:22,421 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 21:27:22,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:22,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131104355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:22,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:22,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2022-03-15 21:27:22,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [134505790] [2022-03-15 21:27:22,530 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:22,531 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:22,532 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2022-03-15 21:27:22,532 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:22,558 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14981#(< i1 N1)] [2022-03-15 21:27:22,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:27:22,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:27:22,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:27:22,558 INFO L87 Difference]: Start difference. First operand 160 states and 409 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 21:27:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:22,689 INFO L93 Difference]: Finished difference Result 237 states and 527 transitions. [2022-03-15 21:27:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:27:22,689 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 15 [2022-03-15 21:27:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:22,690 INFO L225 Difference]: With dead ends: 237 [2022-03-15 21:27:22,690 INFO L226 Difference]: Without dead ends: 233 [2022-03-15 21:27:22,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:27:22,690 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:22,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-15 21:27:22,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 159. [2022-03-15 21:27:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.537974683544304) internal successors, (401), 158 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:22,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 401 transitions. [2022-03-15 21:27:22,695 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 401 transitions. Word has length 15 [2022-03-15 21:27:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:22,695 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 401 transitions. [2022-03-15 21:27:22,695 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 21:27:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 401 transitions. [2022-03-15 21:27:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:22,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:22,695 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:22,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 21:27:22,907 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 21:27:22,907 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:22,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash 871907031, now seen corresponding path program 37 times [2022-03-15 21:27:22,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:22,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106493246] [2022-03-15 21:27:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:22,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:22,966 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 21:27:22,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:22,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106493246] [2022-03-15 21:27:22,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106493246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:22,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448575728] [2022-03-15 21:27:22,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:22,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:22,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:22,967 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 21:27:22,968 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 21:27:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:22,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:23,124 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 21:27:23,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:23,250 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 21:27:23,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448575728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:23,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:23,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2022-03-15 21:27:23,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2015283433] [2022-03-15 21:27:23,251 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:23,252 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:23,253 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:27:23,253 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:23,339 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [15658#(< i1 N1), 15660#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 15659#(or (< (+ i1 1) N1) (<= N1 i1)), 15661#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:27:23,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:27:23,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:27:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:27:23,340 INFO L87 Difference]: Start difference. First operand 159 states and 401 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 21:27:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:23,726 INFO L93 Difference]: Finished difference Result 236 states and 511 transitions. [2022-03-15 21:27:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:27:23,726 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 15 [2022-03-15 21:27:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:23,727 INFO L225 Difference]: With dead ends: 236 [2022-03-15 21:27:23,727 INFO L226 Difference]: Without dead ends: 231 [2022-03-15 21:27:23,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:27:23,728 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:23,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-15 21:27:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2022-03-15 21:27:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.5345911949685536) internal successors, (403), 159 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2022-03-15 21:27:23,732 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 15 [2022-03-15 21:27:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:23,732 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2022-03-15 21:27:23,732 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 21:27:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2022-03-15 21:27:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:23,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:23,733 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:23,755 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 21:27:23,947 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 21:27:23,947 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1759410712, now seen corresponding path program 38 times [2022-03-15 21:27:23,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:23,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562424818] [2022-03-15 21:27:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:23,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:24,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:24,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562424818] [2022-03-15 21:27:24,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562424818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:24,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505032026] [2022-03-15 21:27:24,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:24,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:24,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:24,009 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 21:27:24,010 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 21:27:24,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:24,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:24,161 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 21:27:24,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:24,291 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 21:27:24,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505032026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:24,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:24,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2022-03-15 21:27:24,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1431208643] [2022-03-15 21:27:24,291 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:24,292 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:24,294 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 23 transitions. [2022-03-15 21:27:24,294 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:24,325 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [16354#(or (< (+ i1 1) N1) (<= N1 i1)), 16319#(< i1 N1)] [2022-03-15 21:27:24,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:27:24,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:27:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:27:24,326 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:27:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:24,434 INFO L93 Difference]: Finished difference Result 204 states and 455 transitions. [2022-03-15 21:27:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:27:24,435 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 15 [2022-03-15 21:27:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:24,435 INFO L225 Difference]: With dead ends: 204 [2022-03-15 21:27:24,436 INFO L226 Difference]: Without dead ends: 204 [2022-03-15 21:27:24,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:27:24,436 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:24,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-15 21:27:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2022-03-15 21:27:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5197368421052633) internal successors, (383), 152 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 383 transitions. [2022-03-15 21:27:24,440 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 383 transitions. Word has length 15 [2022-03-15 21:27:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:24,440 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 383 transitions. [2022-03-15 21:27:24,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 21:27:24,440 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 383 transitions. [2022-03-15 21:27:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:24,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:24,441 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:24,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 21:27:24,647 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 21:27:24,647 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1680249930, now seen corresponding path program 39 times [2022-03-15 21:27:24,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:24,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935944701] [2022-03-15 21:27:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:24,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:24,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:24,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935944701] [2022-03-15 21:27:24,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935944701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:24,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488878032] [2022-03-15 21:27:24,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:24,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:24,732 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 21:27:24,733 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 21:27:24,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:27:24,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:24,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:24,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:25,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488878032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:25,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:25,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2022-03-15 21:27:25,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [288313341] [2022-03-15 21:27:25,030 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:25,031 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:25,033 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2022-03-15 21:27:25,033 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:25,103 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [16984#(or (< (+ i1 1) N1) (<= N1 i1)), 16985#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 16949#(< i1 N1)] [2022-03-15 21:27:25,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:27:25,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:25,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:27:25,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:27:25,104 INFO L87 Difference]: Start difference. First operand 153 states and 383 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:25,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:25,329 INFO L93 Difference]: Finished difference Result 206 states and 453 transitions. [2022-03-15 21:27:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:27:25,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 21:27:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:25,331 INFO L225 Difference]: With dead ends: 206 [2022-03-15 21:27:25,331 INFO L226 Difference]: Without dead ends: 206 [2022-03-15 21:27:25,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:27:25,332 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:25,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-15 21:27:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2022-03-15 21:27:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.4863013698630136) internal successors, (363), 146 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 363 transitions. [2022-03-15 21:27:25,336 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 363 transitions. Word has length 15 [2022-03-15 21:27:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:25,336 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 363 transitions. [2022-03-15 21:27:25,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 363 transitions. [2022-03-15 21:27:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:25,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:25,337 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:25,361 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 21:27:25,547 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 21:27:25,547 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash 317841868, now seen corresponding path program 40 times [2022-03-15 21:27:25,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:25,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791697089] [2022-03-15 21:27:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:25,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:25,605 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 21:27:25,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:25,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791697089] [2022-03-15 21:27:25,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791697089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:25,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261296634] [2022-03-15 21:27:25,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:25,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:25,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:25,606 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 21:27:25,607 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 21:27:25,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:25,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:25,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:25,749 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 21:27:25,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:25,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261296634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:25,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:25,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-15 21:27:25,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1050920442] [2022-03-15 21:27:25,835 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:25,835 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:25,837 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2022-03-15 21:27:25,837 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:25,926 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [17612#(or (<= N2 (+ i2 1)) (< i1 N1)), 17610#(< i1 N1), 17611#(or (<= N2 i2) (< i1 N1))] [2022-03-15 21:27:25,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:27:25,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:25,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:27:25,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:27:25,926 INFO L87 Difference]: Start difference. First operand 147 states and 363 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 21:27:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:26,057 INFO L93 Difference]: Finished difference Result 187 states and 413 transitions. [2022-03-15 21:27:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:27:26,058 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 15 [2022-03-15 21:27:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:26,058 INFO L225 Difference]: With dead ends: 187 [2022-03-15 21:27:26,058 INFO L226 Difference]: Without dead ends: 181 [2022-03-15 21:27:26,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:27:26,059 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:26,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-15 21:27:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 137. [2022-03-15 21:27:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.5220588235294117) internal successors, (343), 136 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 343 transitions. [2022-03-15 21:27:26,061 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 343 transitions. Word has length 15 [2022-03-15 21:27:26,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:26,061 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 343 transitions. [2022-03-15 21:27:26,061 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 21:27:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 343 transitions. [2022-03-15 21:27:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:26,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:26,062 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:26,077 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 21:27:26,262 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 21:27:26,263 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:26,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:26,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1436861387, now seen corresponding path program 41 times [2022-03-15 21:27:26,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:26,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087413405] [2022-03-15 21:27:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:26,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:26,341 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 21:27:26,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:26,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087413405] [2022-03-15 21:27:26,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087413405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:26,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719503040] [2022-03-15 21:27:26,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:26,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:26,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:26,344 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 21:27:26,367 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 21:27:26,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:27:26,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:26,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:26,540 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 21:27:26,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:26,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719503040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:26,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:26,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-15 21:27:26,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1737665820] [2022-03-15 21:27:26,659 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:26,660 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:26,662 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:27:26,662 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:26,740 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [18196#(or (< i2 N2) (< i1 N1)), 18195#(< i1 N1), 18197#(or (< i1 N1) (<= (+ 2 i2) N2))] [2022-03-15 21:27:26,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:27:26,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:26,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:27:26,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:27:26,741 INFO L87 Difference]: Start difference. First operand 137 states and 343 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:26,886 INFO L93 Difference]: Finished difference Result 205 states and 440 transitions. [2022-03-15 21:27:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:27:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 21:27:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:26,887 INFO L225 Difference]: With dead ends: 205 [2022-03-15 21:27:26,887 INFO L226 Difference]: Without dead ends: 201 [2022-03-15 21:27:26,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:27:26,888 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:26,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-15 21:27:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 137. [2022-03-15 21:27:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.485294117647059) internal successors, (338), 136 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 338 transitions. [2022-03-15 21:27:26,891 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 338 transitions. Word has length 15 [2022-03-15 21:27:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:26,891 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 338 transitions. [2022-03-15 21:27:26,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 338 transitions. [2022-03-15 21:27:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:26,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:26,892 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:26,917 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 21:27:27,103 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 21:27:27,103 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1061154550, now seen corresponding path program 42 times [2022-03-15 21:27:27,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:27,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30752959] [2022-03-15 21:27:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:27,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:27,170 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 21:27:27,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:27,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30752959] [2022-03-15 21:27:27,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30752959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:27,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415588637] [2022-03-15 21:27:27,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:27,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:27,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:27,171 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 21:27:27,172 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 21:27:27,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:27:27,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:27,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:27,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:27,329 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 21:27:27,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:27,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415588637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:27,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:27,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-03-15 21:27:27,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1756392800] [2022-03-15 21:27:27,444 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:27,445 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:27,447 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:27:27,447 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:27,507 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [18794#(or (<= N2 i2) (< i1 N1)), 18793#(< i1 N1)] [2022-03-15 21:27:27,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:27:27,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:27:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:27:27,508 INFO L87 Difference]: Start difference. First operand 137 states and 338 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 21:27:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:27,665 INFO L93 Difference]: Finished difference Result 173 states and 385 transitions. [2022-03-15 21:27:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:27:27,665 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 21:27:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:27,666 INFO L225 Difference]: With dead ends: 173 [2022-03-15 21:27:27,666 INFO L226 Difference]: Without dead ends: 169 [2022-03-15 21:27:27,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:27:27,667 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:27,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-15 21:27:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2022-03-15 21:27:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.5) internal successors, (330), 132 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 330 transitions. [2022-03-15 21:27:27,670 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 330 transitions. Word has length 15 [2022-03-15 21:27:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:27,670 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 330 transitions. [2022-03-15 21:27:27,670 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 21:27:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 330 transitions. [2022-03-15 21:27:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:27,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:27,671 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:27,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:27,871 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 21:27:27,872 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1350753427, now seen corresponding path program 43 times [2022-03-15 21:27:27,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:27,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856672672] [2022-03-15 21:27:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:27,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:27,935 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 21:27:27,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:27,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856672672] [2022-03-15 21:27:27,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856672672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:27,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519111922] [2022-03-15 21:27:27,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:27,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:27,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:27,936 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 21:27:27,937 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 21:27:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:27,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:27,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:28,083 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 21:27:28,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:28,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519111922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:28,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:28,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-15 21:27:28,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [819366347] [2022-03-15 21:27:28,192 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:28,193 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:28,194 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 23 transitions. [2022-03-15 21:27:28,194 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:28,236 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [19358#(or (< i2 N2) (< i1 N1)), 19357#(< i1 N1)] [2022-03-15 21:27:28,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:27:28,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:28,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:27:28,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:27:28,237 INFO L87 Difference]: Start difference. First operand 133 states and 330 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 21:27:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:28,321 INFO L93 Difference]: Finished difference Result 205 states and 437 transitions. [2022-03-15 21:27:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:27:28,321 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 15 [2022-03-15 21:27:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:28,322 INFO L225 Difference]: With dead ends: 205 [2022-03-15 21:27:28,322 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 21:27:28,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:27:28,327 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:28,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 21:27:28,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 137. [2022-03-15 21:27:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.514705882352941) internal successors, (342), 136 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 342 transitions. [2022-03-15 21:27:28,331 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 342 transitions. Word has length 15 [2022-03-15 21:27:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:28,331 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 342 transitions. [2022-03-15 21:27:28,331 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 21:27:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 342 transitions. [2022-03-15 21:27:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:28,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:28,332 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:28,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 21:27:28,535 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 21:27:28,535 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:28,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:28,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1547266932, now seen corresponding path program 44 times [2022-03-15 21:27:28,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:28,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255505584] [2022-03-15 21:27:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:28,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:28,592 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 21:27:28,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:28,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255505584] [2022-03-15 21:27:28,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255505584] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:28,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577476401] [2022-03-15 21:27:28,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:28,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:28,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:28,594 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 21:27:28,624 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 21:27:28,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:28,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:28,775 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 21:27:28,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:28,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577476401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:28,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:28,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2022-03-15 21:27:28,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [734923001] [2022-03-15 21:27:28,905 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:28,906 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:28,908 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 23 transitions. [2022-03-15 21:27:28,908 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:28,931 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19950#(< i1 N1)] [2022-03-15 21:27:28,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:27:28,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:28,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:27:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:27:28,932 INFO L87 Difference]: Start difference. First operand 137 states and 342 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 21:27:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:29,098 INFO L93 Difference]: Finished difference Result 177 states and 408 transitions. [2022-03-15 21:27:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:27:29,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 15 [2022-03-15 21:27:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:29,100 INFO L225 Difference]: With dead ends: 177 [2022-03-15 21:27:29,100 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 21:27:29,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:27:29,101 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:29,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 21:27:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 142. [2022-03-15 21:27:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.5602836879432624) internal successors, (361), 141 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 361 transitions. [2022-03-15 21:27:29,104 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 361 transitions. Word has length 15 [2022-03-15 21:27:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:29,104 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 361 transitions. [2022-03-15 21:27:29,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 21:27:29,104 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 361 transitions. [2022-03-15 21:27:29,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:29,105 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:29,105 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:29,128 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 21:27:29,305 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 21:27:29,305 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1486523083, now seen corresponding path program 45 times [2022-03-15 21:27:29,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:29,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564016166] [2022-03-15 21:27:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:29,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:29,382 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 21:27:29,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:29,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564016166] [2022-03-15 21:27:29,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564016166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:29,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825680942] [2022-03-15 21:27:29,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:29,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:29,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:29,384 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 21:27:29,385 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 21:27:29,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:27:29,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:29,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:29,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:29,572 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 21:27:29,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:29,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825680942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:29,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:29,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2022-03-15 21:27:29,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2034874933] [2022-03-15 21:27:29,732 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:29,733 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:29,735 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:27:29,735 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:29,849 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [20538#(or (< (+ i1 1) N1) (<= N1 i1)), 20539#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 20541#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 20537#(< i1 N1), 20540#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:27:29,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:27:29,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:27:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:27:29,850 INFO L87 Difference]: Start difference. First operand 142 states and 361 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 21:27:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:30,323 INFO L93 Difference]: Finished difference Result 241 states and 513 transitions. [2022-03-15 21:27:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:27:30,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 21:27:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:30,324 INFO L225 Difference]: With dead ends: 241 [2022-03-15 21:27:30,324 INFO L226 Difference]: Without dead ends: 241 [2022-03-15 21:27:30,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1757, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:27:30,325 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:30,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-15 21:27:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 153. [2022-03-15 21:27:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5657894736842106) internal successors, (390), 152 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 390 transitions. [2022-03-15 21:27:30,329 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 390 transitions. Word has length 15 [2022-03-15 21:27:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:30,329 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 390 transitions. [2022-03-15 21:27:30,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 21:27:30,329 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 390 transitions. [2022-03-15 21:27:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:30,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:30,330 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:30,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-15 21:27:30,530 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 21:27:30,531 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:30,531 INFO L85 PathProgramCache]: Analyzing trace with hash -599019402, now seen corresponding path program 46 times [2022-03-15 21:27:30,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:30,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392872440] [2022-03-15 21:27:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:30,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:30,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:30,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392872440] [2022-03-15 21:27:30,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392872440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:30,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647149679] [2022-03-15 21:27:30,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:30,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:30,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:30,592 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 21:27:30,593 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 21:27:30,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:30,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:30,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:30,733 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 21:27:30,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:30,858 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 21:27:30,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647149679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:30,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:30,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2022-03-15 21:27:30,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [368110729] [2022-03-15 21:27:30,858 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:30,859 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:30,860 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 21 transitions. [2022-03-15 21:27:30,860 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:30,887 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [21237#(or (< (+ i1 1) N1) (<= N1 i1)), 21202#(< i1 N1)] [2022-03-15 21:27:30,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:27:30,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:30,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:27:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:27:30,897 INFO L87 Difference]: Start difference. First operand 153 states and 390 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 21:27:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:31,002 INFO L93 Difference]: Finished difference Result 198 states and 452 transitions. [2022-03-15 21:27:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:27:31,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 15 [2022-03-15 21:27:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:31,003 INFO L225 Difference]: With dead ends: 198 [2022-03-15 21:27:31,003 INFO L226 Difference]: Without dead ends: 198 [2022-03-15 21:27:31,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:27:31,003 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:31,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:27:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-03-15 21:27:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 153. [2022-03-15 21:27:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5657894736842106) internal successors, (390), 152 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 390 transitions. [2022-03-15 21:27:31,007 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 390 transitions. Word has length 15 [2022-03-15 21:27:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:31,007 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 390 transitions. [2022-03-15 21:27:31,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 21:27:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 390 transitions. [2022-03-15 21:27:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:31,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:31,008 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:31,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 21:27:31,211 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 21:27:31,211 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:31,212 INFO L85 PathProgramCache]: Analyzing trace with hash 256287252, now seen corresponding path program 47 times [2022-03-15 21:27:31,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:31,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859655521] [2022-03-15 21:27:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:31,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:31,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:31,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859655521] [2022-03-15 21:27:31,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859655521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:31,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125953343] [2022-03-15 21:27:31,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:31,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:31,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:31,283 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 21:27:31,283 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 21:27:31,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:27:31,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:31,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:31,423 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 21:27:31,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:31,543 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 21:27:31,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125953343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:31,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:31,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2022-03-15 21:27:31,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [705253504] [2022-03-15 21:27:31,544 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:31,544 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:31,546 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 23 transitions. [2022-03-15 21:27:31,546 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:31,609 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [21828#(< i1 N1), 21863#(or (< (+ i1 1) N1) (<= N1 i1)), 21864#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:27:31,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:27:31,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:31,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:27:31,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:27:31,610 INFO L87 Difference]: Start difference. First operand 153 states and 390 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:27:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:31,715 INFO L93 Difference]: Finished difference Result 179 states and 415 transitions. [2022-03-15 21:27:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:27:31,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 15 [2022-03-15 21:27:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:31,716 INFO L225 Difference]: With dead ends: 179 [2022-03-15 21:27:31,716 INFO L226 Difference]: Without dead ends: 179 [2022-03-15 21:27:31,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:27:31,716 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:31,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:27:31,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-15 21:27:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 144. [2022-03-15 21:27:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.5664335664335662) internal successors, (367), 143 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 367 transitions. [2022-03-15 21:27:31,719 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 367 transitions. Word has length 15 [2022-03-15 21:27:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:31,720 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 367 transitions. [2022-03-15 21:27:31,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21:27:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 367 transitions. [2022-03-15 21:27:31,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:27:31,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:31,720 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:31,742 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 21:27:31,934 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 21:27:31,935 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:31,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1000989750, now seen corresponding path program 48 times [2022-03-15 21:27:31,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:31,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087505467] [2022-03-15 21:27:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:32,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:32,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087505467] [2022-03-15 21:27:32,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087505467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:32,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111706846] [2022-03-15 21:27:32,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:32,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:32,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:32,026 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 21:27:32,027 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 21:27:32,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:27:32,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:32,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:27:32,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:32,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:32,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111706846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:32,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:32,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-03-15 21:27:32,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1525926104] [2022-03-15 21:27:32,345 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:32,346 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:32,348 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2022-03-15 21:27:32,348 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:32,445 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [22453#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 22454#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 22452#(or (< (+ i1 1) N1) (<= N1 i1)), 22417#(< i1 N1)] [2022-03-15 21:27:32,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:27:32,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:32,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:27:32,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:27:32,445 INFO L87 Difference]: Start difference. First operand 144 states and 367 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:27:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:32,644 INFO L93 Difference]: Finished difference Result 175 states and 407 transitions. [2022-03-15 21:27:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:27:32,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:27:32,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:32,645 INFO L225 Difference]: With dead ends: 175 [2022-03-15 21:27:32,645 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 21:27:32,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:27:32,646 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:32,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:32,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 21:27:32,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 148. [2022-03-15 21:27:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.578231292517007) internal successors, (379), 147 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 379 transitions. [2022-03-15 21:27:32,650 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 379 transitions. Word has length 15 [2022-03-15 21:27:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:32,650 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 379 transitions. [2022-03-15 21:27:32,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21:27:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 379 transitions. [2022-03-15 21:27:32,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:27:32,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:32,651 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:32,671 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 21:27:32,867 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 21:27:32,867 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1556543266, now seen corresponding path program 49 times [2022-03-15 21:27:32,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:32,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879683902] [2022-03-15 21:27:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:32,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:32,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:32,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879683902] [2022-03-15 21:27:32,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879683902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:32,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877190587] [2022-03-15 21:27:32,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:32,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:32,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:32,908 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 21:27:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:32,939 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 21:27:32,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:27:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:33,008 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-03-15 21:27:33,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 65 [2022-03-15 21:27:33,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:33,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 96 [2022-03-15 21:27:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:33,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:34,040 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-03-15 21:27:34,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 80 [2022-03-15 21:27:34,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:34,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 100 [2022-03-15 21:27:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:34,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877190587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:34,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:34,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 15 [2022-03-15 21:27:34,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2033473209] [2022-03-15 21:27:34,133 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:34,134 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:34,137 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 46 transitions. [2022-03-15 21:27:34,137 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:34,274 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:27:34,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:27:34,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:34,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:27:34,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:27:34,275 INFO L87 Difference]: Start difference. First operand 148 states and 379 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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 21:27:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:34,376 INFO L93 Difference]: Finished difference Result 212 states and 499 transitions. [2022-03-15 21:27:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:27:34,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:27:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:34,378 INFO L225 Difference]: With dead ends: 212 [2022-03-15 21:27:34,378 INFO L226 Difference]: Without dead ends: 209 [2022-03-15 21:27:34,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:27:34,378 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:34,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-15 21:27:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 179. [2022-03-15 21:27:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.5842696629213484) internal successors, (460), 178 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 460 transitions. [2022-03-15 21:27:34,382 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 460 transitions. Word has length 16 [2022-03-15 21:27:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:34,382 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 460 transitions. [2022-03-15 21:27:34,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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 21:27:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 460 transitions. [2022-03-15 21:27:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:27:34,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:34,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:34,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 21:27:34,591 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 21:27:34,591 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:34,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash -484204126, now seen corresponding path program 50 times [2022-03-15 21:27:34,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:34,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701758253] [2022-03-15 21:27:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:27:34,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:34,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701758253] [2022-03-15 21:27:34,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701758253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:34,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290554568] [2022-03-15 21:27:34,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:34,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:34,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:34,628 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 21:27:34,651 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 21:27:34,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:34,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:34,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:27:34,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:34,822 INFO L353 Elim1Store]: treesize reduction 120, result has 33.7 percent of original size [2022-03-15 21:27:34,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 93 [2022-03-15 21:27:34,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:34,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 93 [2022-03-15 21:27:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:34,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:35,011 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-03-15 21:27:35,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 84 [2022-03-15 21:27:35,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:35,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 100 [2022-03-15 21:27:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:35,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290554568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:35,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:35,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 18 [2022-03-15 21:27:35,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2057908066] [2022-03-15 21:27:35,095 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:35,096 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:35,099 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:27:35,099 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:35,162 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23731#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:27:35,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:27:35,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:27:35,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:27:35,163 INFO L87 Difference]: Start difference. First operand 179 states and 460 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21:27:35,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:35,240 INFO L93 Difference]: Finished difference Result 270 states and 642 transitions. [2022-03-15 21:27:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:27:35,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 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 16 [2022-03-15 21:27:35,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:35,241 INFO L225 Difference]: With dead ends: 270 [2022-03-15 21:27:35,241 INFO L226 Difference]: Without dead ends: 267 [2022-03-15 21:27:35,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:27:35,242 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:35,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:35,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-15 21:27:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 209. [2022-03-15 21:27:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.668269230769231) internal successors, (555), 208 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 555 transitions. [2022-03-15 21:27:35,246 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 555 transitions. Word has length 16 [2022-03-15 21:27:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:35,246 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 555 transitions. [2022-03-15 21:27:35,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21:27:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 555 transitions. [2022-03-15 21:27:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:27:35,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:35,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:35,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:35,467 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 21:27:35,467 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:35,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:35,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1126308130, now seen corresponding path program 51 times [2022-03-15 21:27:35,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:35,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593628263] [2022-03-15 21:27:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:35,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:27:35,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:35,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593628263] [2022-03-15 21:27:35,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593628263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:35,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023078797] [2022-03-15 21:27:35,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:35,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:35,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:35,500 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 21:27:35,501 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 21:27:35,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:27:35,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:35,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:27:35,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:35,682 INFO L353 Elim1Store]: treesize reduction 103, result has 31.8 percent of original size [2022-03-15 21:27:35,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 123 treesize of output 94 [2022-03-15 21:27:35,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:35,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 93 [2022-03-15 21:27:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:35,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:35,955 INFO L353 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2022-03-15 21:27:35,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 100 [2022-03-15 21:27:35,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:35,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 100 [2022-03-15 21:27:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:36,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023078797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:36,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:36,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2022-03-15 21:27:36,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [501585430] [2022-03-15 21:27:36,040 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:36,041 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:36,043 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:27:36,044 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:36,103 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [24497#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0)), 24501#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter))))] [2022-03-15 21:27:36,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:27:36,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:27:36,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:27:36,105 INFO L87 Difference]: Start difference. First operand 209 states and 555 transitions. Second operand has 9 states, 8 states have (on average 2.75) 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 21:27:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:36,207 INFO L93 Difference]: Finished difference Result 301 states and 736 transitions. [2022-03-15 21:27:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:27:36,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) 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 16 [2022-03-15 21:27:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:36,209 INFO L225 Difference]: With dead ends: 301 [2022-03-15 21:27:36,209 INFO L226 Difference]: Without dead ends: 298 [2022-03-15 21:27:36,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:27:36,209 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:36,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-15 21:27:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 235. [2022-03-15 21:27:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.730769230769231) internal successors, (639), 234 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:36,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 639 transitions. [2022-03-15 21:27:36,215 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 639 transitions. Word has length 16 [2022-03-15 21:27:36,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:36,215 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 639 transitions. [2022-03-15 21:27:36,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) 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 21:27:36,215 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 639 transitions. [2022-03-15 21:27:36,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:27:36,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:36,216 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:36,236 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 21:27:36,427 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 21:27:36,427 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:36,427 INFO L85 PathProgramCache]: Analyzing trace with hash -487419486, now seen corresponding path program 52 times [2022-03-15 21:27:36,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:36,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099189662] [2022-03-15 21:27:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:36,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:27:36,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:36,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099189662] [2022-03-15 21:27:36,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099189662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:36,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299626594] [2022-03-15 21:27:36,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:36,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:36,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:36,462 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 21:27:36,471 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 21:27:36,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:36,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:27:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:36,573 INFO L353 Elim1Store]: treesize reduction 16, result has 70.9 percent of original size [2022-03-15 21:27:36,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 69 [2022-03-15 21:27:37,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:37,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 93 [2022-03-15 21:27:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:37,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:37,199 INFO L353 Elim1Store]: treesize reduction 80, result has 33.9 percent of original size [2022-03-15 21:27:37,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 112 [2022-03-15 21:27:37,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:37,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 100 [2022-03-15 21:27:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:37,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299626594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:37,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:37,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 16 [2022-03-15 21:27:37,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2065507514] [2022-03-15 21:27:37,270 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:37,271 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:37,272 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:27:37,272 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:37,354 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [25411#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 25410#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0)), 25412#(or (not (= (select f_inv (select f counter)) counter)) (= (select f (select f (select f counter))) 0) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter))))] [2022-03-15 21:27:37,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:27:37,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:27:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:27:37,355 INFO L87 Difference]: Start difference. First operand 235 states and 639 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 21:27:37,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:37,448 INFO L93 Difference]: Finished difference Result 321 states and 800 transitions. [2022-03-15 21:27:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:27:37,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:27:37,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:37,450 INFO L225 Difference]: With dead ends: 321 [2022-03-15 21:27:37,450 INFO L226 Difference]: Without dead ends: 318 [2022-03-15 21:27:37,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:27:37,456 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:37,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-15 21:27:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 255. [2022-03-15 21:27:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.779527559055118) internal successors, (706), 254 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 706 transitions. [2022-03-15 21:27:37,461 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 706 transitions. Word has length 16 [2022-03-15 21:27:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:37,462 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 706 transitions. [2022-03-15 21:27:37,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 21:27:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 706 transitions. [2022-03-15 21:27:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:27:37,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:37,463 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:37,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-15 21:27:37,675 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 21:27:37,675 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:37,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:37,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1026631970, now seen corresponding path program 53 times [2022-03-15 21:27:37,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:37,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996337347] [2022-03-15 21:27:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:37,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:37,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996337347] [2022-03-15 21:27:37,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996337347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:37,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456776592] [2022-03-15 21:27:37,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:37,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:37,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:37,720 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 21:27:37,721 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 21:27:37,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:27:37,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:37,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:27:37,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:37,865 INFO L353 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2022-03-15 21:27:37,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 75 [2022-03-15 21:27:38,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:38,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 96 [2022-03-15 21:27:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:38,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:38,662 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-03-15 21:27:38,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 80 [2022-03-15 21:27:38,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:27:38,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 100 [2022-03-15 21:27:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:38,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456776592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:38,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:38,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 16 [2022-03-15 21:27:38,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [541144925] [2022-03-15 21:27:38,758 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:38,759 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:38,762 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:27:38,762 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:38,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:27:38,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:27:38,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:27:38,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:27:38,812 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:27:38,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:27:38,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:27:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:27:38,812 INFO L87 Difference]: Start difference. First operand 255 states and 706 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:38,883 INFO L93 Difference]: Finished difference Result 321 states and 820 transitions. [2022-03-15 21:27:38,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:27:38,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:27:38,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:38,885 INFO L225 Difference]: With dead ends: 321 [2022-03-15 21:27:38,885 INFO L226 Difference]: Without dead ends: 318 [2022-03-15 21:27:38,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:27:38,885 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:38,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-15 21:27:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 269. [2022-03-15 21:27:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.8059701492537314) internal successors, (752), 268 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 752 transitions. [2022-03-15 21:27:38,891 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 752 transitions. Word has length 16 [2022-03-15 21:27:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:38,891 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 752 transitions. [2022-03-15 21:27:38,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 752 transitions. [2022-03-15 21:27:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:27:38,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:38,892 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:38,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 21:27:39,109 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 21:27:39,109 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash 832076983, now seen corresponding path program 54 times [2022-03-15 21:27:39,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:39,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267332616] [2022-03-15 21:27:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:39,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:39,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:39,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267332616] [2022-03-15 21:27:39,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267332616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:39,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020954502] [2022-03-15 21:27:39,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:39,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:39,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:39,195 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 21:27:39,195 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 21:27:39,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:27:39,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:27:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:39,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:39,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020954502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:39,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:39,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 21:27:39,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [520032993] [2022-03-15 21:27:39,464 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:39,465 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:39,467 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2022-03-15 21:27:39,467 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:39,576 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [27330#(or (<= N1 (+ 2 i1)) (< i2 N2)), 27327#(or (< i2 N2) (<= (+ N1 1) i1)), 27326#(< i2 N2), 27328#(or (< i2 N2) (<= N1 i1)), 27329#(or (<= N1 (+ i1 1)) (< i2 N2))] [2022-03-15 21:27:39,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:27:39,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:39,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:27:39,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:27:39,577 INFO L87 Difference]: Start difference. First operand 269 states and 752 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:39,747 INFO L93 Difference]: Finished difference Result 371 states and 903 transitions. [2022-03-15 21:27:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:27:39,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:27:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:39,748 INFO L225 Difference]: With dead ends: 371 [2022-03-15 21:27:39,748 INFO L226 Difference]: Without dead ends: 361 [2022-03-15 21:27:39,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=400, Invalid=1082, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:27:39,749 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:39,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:39,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-15 21:27:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 234. [2022-03-15 21:27:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.776824034334764) internal successors, (647), 233 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 647 transitions. [2022-03-15 21:27:39,753 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 647 transitions. Word has length 16 [2022-03-15 21:27:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:39,753 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 647 transitions. [2022-03-15 21:27:39,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 647 transitions. [2022-03-15 21:27:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:39,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:39,754 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:39,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 21:27:39,967 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 21:27:39,967 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:39,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1008177933, now seen corresponding path program 55 times [2022-03-15 21:27:39,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:39,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669306789] [2022-03-15 21:27:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:40,059 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 21:27:40,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:40,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669306789] [2022-03-15 21:27:40,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669306789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:40,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538444825] [2022-03-15 21:27:40,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:40,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:40,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:40,061 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 21:27:40,062 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 21:27:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:40,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:40,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:40,278 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 21:27:40,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:40,379 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 21:27:40,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538444825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:40,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:40,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 21:27:40,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1122335668] [2022-03-15 21:27:40,380 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:40,381 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:40,384 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 51 transitions. [2022-03-15 21:27:40,384 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:40,585 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [28311#(< i1 N1), 28312#(or (<= N2 i2) (< i1 N1)), 28314#(or (< i1 N1) (<= N2 (+ 2 i2))), 28315#(or (<= N2 (+ 3 i2)) (< i1 N1)), 28313#(or (<= N2 (+ i2 1)) (< i1 N1))] [2022-03-15 21:27:40,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:27:40,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:40,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:27:40,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:27:40,586 INFO L87 Difference]: Start difference. First operand 234 states and 647 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 21:27:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:40,807 INFO L93 Difference]: Finished difference Result 379 states and 886 transitions. [2022-03-15 21:27:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:27:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 17 [2022-03-15 21:27:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:40,809 INFO L225 Difference]: With dead ends: 379 [2022-03-15 21:27:40,809 INFO L226 Difference]: Without dead ends: 368 [2022-03-15 21:27:40,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=489, Invalid=1317, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:27:40,809 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:40,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-03-15 21:27:40,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 248. [2022-03-15 21:27:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.659919028340081) internal successors, (657), 247 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 657 transitions. [2022-03-15 21:27:40,815 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 657 transitions. Word has length 17 [2022-03-15 21:27:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:40,815 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 657 transitions. [2022-03-15 21:27:40,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 21:27:40,815 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 657 transitions. [2022-03-15 21:27:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:40,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:40,816 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:40,848 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 21:27:41,037 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 21:27:41,037 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:41,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1634470090, now seen corresponding path program 56 times [2022-03-15 21:27:41,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:41,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309369857] [2022-03-15 21:27:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:41,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:41,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:41,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309369857] [2022-03-15 21:27:41,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309369857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:41,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865033705] [2022-03-15 21:27:41,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:41,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:41,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:41,132 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 21:27:41,133 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 21:27:41,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:41,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:41,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:41,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:41,441 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 21:27:41,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865033705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:41,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:41,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2022-03-15 21:27:41,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1781264872] [2022-03-15 21:27:41,441 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:41,442 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:41,445 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 49 transitions. [2022-03-15 21:27:41,445 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:41,668 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [29340#(or (< i1 N1) (<= (+ 3 i2) N2)), 29341#(or (<= (+ i2 4) N2) (< i1 N1)), 29338#(or (< i2 N2) (< i1 N1)), 29339#(or (< i1 N1) (<= (+ 2 i2) N2)), 29337#(< i1 N1)] [2022-03-15 21:27:41,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:27:41,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:41,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:27:41,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:27:41,668 INFO L87 Difference]: Start difference. First operand 248 states and 657 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 21:27:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:41,861 INFO L93 Difference]: Finished difference Result 335 states and 782 transitions. [2022-03-15 21:27:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:27:41,861 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 17 [2022-03-15 21:27:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:41,862 INFO L225 Difference]: With dead ends: 335 [2022-03-15 21:27:41,862 INFO L226 Difference]: Without dead ends: 321 [2022-03-15 21:27:41,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=1340, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:27:41,863 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:41,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-15 21:27:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 244. [2022-03-15 21:27:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6213991769547325) internal successors, (637), 243 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 637 transitions. [2022-03-15 21:27:41,870 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 637 transitions. Word has length 17 [2022-03-15 21:27:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:41,870 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 637 transitions. [2022-03-15 21:27:41,870 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 21:27:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 637 transitions. [2022-03-15 21:27:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:41,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:41,871 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:41,893 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 21:27:42,084 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 21:27:42,084 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:42,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:42,085 INFO L85 PathProgramCache]: Analyzing trace with hash 678966634, now seen corresponding path program 57 times [2022-03-15 21:27:42,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:42,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346637225] [2022-03-15 21:27:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:42,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:42,150 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 21:27:42,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:42,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346637225] [2022-03-15 21:27:42,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346637225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:42,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30243794] [2022-03-15 21:27:42,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:42,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:42,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:42,151 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 21:27:42,152 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 21:27:42,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:27:42,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:42,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:42,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:42,337 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 21:27:42,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:42,486 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 21:27:42,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30243794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:42,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:42,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2022-03-15 21:27:42,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [202499801] [2022-03-15 21:27:42,487 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:42,488 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:42,490 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:27:42,490 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:42,547 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30306#(< i2 N2)] [2022-03-15 21:27:42,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:27:42,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:42,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:27:42,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:27:42,548 INFO L87 Difference]: Start difference. First operand 244 states and 637 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 21:27:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:42,722 INFO L93 Difference]: Finished difference Result 281 states and 697 transitions. [2022-03-15 21:27:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:27:42,722 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 21:27:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:42,723 INFO L225 Difference]: With dead ends: 281 [2022-03-15 21:27:42,723 INFO L226 Difference]: Without dead ends: 280 [2022-03-15 21:27:42,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:27:42,724 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:42,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-03-15 21:27:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 244. [2022-03-15 21:27:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.617283950617284) internal successors, (636), 243 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 636 transitions. [2022-03-15 21:27:42,728 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 636 transitions. Word has length 17 [2022-03-15 21:27:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:42,728 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 636 transitions. [2022-03-15 21:27:42,728 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 21:27:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 636 transitions. [2022-03-15 21:27:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:42,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:42,729 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:42,745 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 21:27:42,929 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 21:27:42,930 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2125449075, now seen corresponding path program 58 times [2022-03-15 21:27:42,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:42,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462253828] [2022-03-15 21:27:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:42,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:43,000 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 21:27:43,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:43,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462253828] [2022-03-15 21:27:43,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462253828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:43,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562914369] [2022-03-15 21:27:43,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:43,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:43,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:43,002 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 21:27:43,038 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 21:27:43,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:43,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:43,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:43,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:43,227 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 21:27:43,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:43,413 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 21:27:43,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562914369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:43,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:43,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2022-03-15 21:27:43,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [943851963] [2022-03-15 21:27:43,414 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:43,415 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:43,417 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:27:43,417 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:43,469 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31223#(< i1 N1)] [2022-03-15 21:27:43,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:27:43,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:27:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:27:43,470 INFO L87 Difference]: Start difference. First operand 244 states and 636 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 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 21:27:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:43,593 INFO L93 Difference]: Finished difference Result 336 states and 773 transitions. [2022-03-15 21:27:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:27:43,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 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 21:27:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:43,594 INFO L225 Difference]: With dead ends: 336 [2022-03-15 21:27:43,594 INFO L226 Difference]: Without dead ends: 334 [2022-03-15 21:27:43,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:27:43,594 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:43,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:43,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-03-15 21:27:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 249. [2022-03-15 21:27:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.6048387096774195) internal successors, (646), 248 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 646 transitions. [2022-03-15 21:27:43,600 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 646 transitions. Word has length 17 [2022-03-15 21:27:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:43,601 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 646 transitions. [2022-03-15 21:27:43,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 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 21:27:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 646 transitions. [2022-03-15 21:27:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:43,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:43,601 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:43,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:43,819 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 21:27:43,819 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:43,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2064705226, now seen corresponding path program 59 times [2022-03-15 21:27:43,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:43,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927525497] [2022-03-15 21:27:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:43,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:43,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:43,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927525497] [2022-03-15 21:27:43,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927525497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:43,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411202172] [2022-03-15 21:27:43,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:43,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:43,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:43,901 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 21:27:43,901 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 21:27:43,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:27:43,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:43,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:43,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:44,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:44,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411202172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:44,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:44,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 27 [2022-03-15 21:27:44,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [278035175] [2022-03-15 21:27:44,252 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:44,253 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:44,255 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:27:44,256 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:44,345 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [32196#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 32195#(or (< (+ i1 1) N1) (<= N1 i1)), 32194#(< i1 N1)] [2022-03-15 21:27:44,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:27:44,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:27:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:27:44,346 INFO L87 Difference]: Start difference. First operand 249 states and 646 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 21:27:44,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:44,724 INFO L93 Difference]: Finished difference Result 369 states and 841 transitions. [2022-03-15 21:27:44,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:27:44,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 21:27:44,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:44,726 INFO L225 Difference]: With dead ends: 369 [2022-03-15 21:27:44,726 INFO L226 Difference]: Without dead ends: 367 [2022-03-15 21:27:44,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=539, Invalid=1911, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:27:44,726 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:44,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:44,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-03-15 21:27:44,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 259. [2022-03-15 21:27:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.616279069767442) internal successors, (675), 258 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 675 transitions. [2022-03-15 21:27:44,731 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 675 transitions. Word has length 17 [2022-03-15 21:27:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:44,731 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 675 transitions. [2022-03-15 21:27:44,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 21:27:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 675 transitions. [2022-03-15 21:27:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:44,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:44,732 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:44,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 21:27:44,945 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 21:27:44,946 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1177201545, now seen corresponding path program 60 times [2022-03-15 21:27:44,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:44,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613493844] [2022-03-15 21:27:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:44,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:45,027 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 21:27:45,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:45,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613493844] [2022-03-15 21:27:45,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613493844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:45,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626110953] [2022-03-15 21:27:45,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:45,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:45,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:45,029 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 21:27:45,031 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 21:27:45,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:27:45,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:45,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:45,212 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 21:27:45,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:45,382 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 21:27:45,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626110953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:45,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:45,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2022-03-15 21:27:45,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [880542488] [2022-03-15 21:27:45,382 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:45,383 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:45,385 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 21:27:45,385 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:45,440 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [33247#(or (< (+ i1 1) N1) (<= N1 i1)), 33204#(< i1 N1)] [2022-03-15 21:27:45,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:27:45,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:45,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:27:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:27:45,441 INFO L87 Difference]: Start difference. First operand 259 states and 675 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 21:27:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:45,586 INFO L93 Difference]: Finished difference Result 356 states and 819 transitions. [2022-03-15 21:27:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:27:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 21:27:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:45,588 INFO L225 Difference]: With dead ends: 356 [2022-03-15 21:27:45,588 INFO L226 Difference]: Without dead ends: 356 [2022-03-15 21:27:45,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:27:45,588 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 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 21:27:45,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-03-15 21:27:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 261. [2022-03-15 21:27:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.6192307692307693) internal successors, (681), 260 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 681 transitions. [2022-03-15 21:27:45,592 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 681 transitions. Word has length 17 [2022-03-15 21:27:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:45,593 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 681 transitions. [2022-03-15 21:27:45,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 21:27:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 681 transitions. [2022-03-15 21:27:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:45,593 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:45,593 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:45,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-15 21:27:45,794 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 21:27:45,794 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:45,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:45,794 INFO L85 PathProgramCache]: Analyzing trace with hash 555790605, now seen corresponding path program 61 times [2022-03-15 21:27:45,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:45,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307262216] [2022-03-15 21:27:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:45,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:45,859 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 21:27:45,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:45,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307262216] [2022-03-15 21:27:45,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307262216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:45,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329604191] [2022-03-15 21:27:45,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:45,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:45,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:45,862 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 21:27:45,892 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 21:27:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:45,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:46,054 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 21:27:46,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:46,206 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 21:27:46,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329604191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:46,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:46,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2022-03-15 21:27:46,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1598034759] [2022-03-15 21:27:46,207 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:46,208 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:46,210 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 21:27:46,210 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:46,247 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34263#(< i1 N1)] [2022-03-15 21:27:46,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:27:46,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:46,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:27:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:27:46,248 INFO L87 Difference]: Start difference. First operand 261 states and 681 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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 21:27:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:46,394 INFO L93 Difference]: Finished difference Result 383 states and 876 transitions. [2022-03-15 21:27:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:27:46,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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 17 [2022-03-15 21:27:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:46,396 INFO L225 Difference]: With dead ends: 383 [2022-03-15 21:27:46,396 INFO L226 Difference]: Without dead ends: 379 [2022-03-15 21:27:46,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=336, Invalid=924, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:27:46,396 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:46,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-03-15 21:27:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 272. [2022-03-15 21:27:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.6199261992619927) internal successors, (710), 271 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 710 transitions. [2022-03-15 21:27:46,402 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 710 transitions. Word has length 17 [2022-03-15 21:27:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:46,402 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 710 transitions. [2022-03-15 21:27:46,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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 21:27:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 710 transitions. [2022-03-15 21:27:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:46,402 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:46,403 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:46,419 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 21:27:46,607 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 21:27:46,607 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash 616534454, now seen corresponding path program 62 times [2022-03-15 21:27:46,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:46,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205220385] [2022-03-15 21:27:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:46,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:46,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:46,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205220385] [2022-03-15 21:27:46,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205220385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:46,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104140348] [2022-03-15 21:27:46,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:46,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:46,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:46,692 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 21:27:46,718 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 21:27:46,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:46,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:46,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:46,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:46,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:47,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104140348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:47,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:47,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 27 [2022-03-15 21:27:47,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [710650696] [2022-03-15 21:27:47,052 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:47,053 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:47,055 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:27:47,055 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:47,153 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [35331#(< i1 N1), 35334#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 35332#(or (< (+ i1 1) N1) (<= N1 i1)), 35333#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:27:47,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:27:47,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:47,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:27:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:27:47,154 INFO L87 Difference]: Start difference. First operand 272 states and 710 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 21:27:47,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:47,574 INFO L93 Difference]: Finished difference Result 405 states and 917 transitions. [2022-03-15 21:27:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:27:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 21:27:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:47,576 INFO L225 Difference]: With dead ends: 405 [2022-03-15 21:27:47,576 INFO L226 Difference]: Without dead ends: 400 [2022-03-15 21:27:47,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=571, Invalid=2081, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:27:47,577 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:47,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-15 21:27:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 279. [2022-03-15 21:27:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6258992805755397) internal successors, (730), 278 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 730 transitions. [2022-03-15 21:27:47,582 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 730 transitions. Word has length 17 [2022-03-15 21:27:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:47,582 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 730 transitions. [2022-03-15 21:27:47,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 21:27:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 730 transitions. [2022-03-15 21:27:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:47,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:47,583 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:47,605 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 21:27:47,799 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 21:27:47,799 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:47,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1504038135, now seen corresponding path program 63 times [2022-03-15 21:27:47,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:47,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385604718] [2022-03-15 21:27:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:47,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:47,878 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 21:27:47,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:47,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385604718] [2022-03-15 21:27:47,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385604718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:47,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165960968] [2022-03-15 21:27:47,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:47,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:47,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:47,879 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 21:27:47,885 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 21:27:47,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:27:47,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:47,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:47,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:48,060 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 21:27:48,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:48,222 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 21:27:48,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165960968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:48,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:48,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2022-03-15 21:27:48,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [30557851] [2022-03-15 21:27:48,222 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:48,223 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:48,225 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2022-03-15 21:27:48,225 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:48,270 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [36463#(or (< (+ i1 1) N1) (<= N1 i1)), 36420#(< i1 N1)] [2022-03-15 21:27:48,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:27:48,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:48,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:27:48,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:27:48,271 INFO L87 Difference]: Start difference. First operand 279 states and 730 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 21:27:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:48,417 INFO L93 Difference]: Finished difference Result 358 states and 834 transitions. [2022-03-15 21:27:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:27:48,417 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 17 [2022-03-15 21:27:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:48,418 INFO L225 Difference]: With dead ends: 358 [2022-03-15 21:27:48,418 INFO L226 Difference]: Without dead ends: 358 [2022-03-15 21:27:48,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:27:48,419 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:48,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-15 21:27:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 269. [2022-03-15 21:27:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.5970149253731343) internal successors, (696), 268 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2022-03-15 21:27:48,425 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 17 [2022-03-15 21:27:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:48,425 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2022-03-15 21:27:48,425 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 21:27:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2022-03-15 21:27:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:48,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:48,425 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:48,444 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 21:27:48,639 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 21:27:48,639 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:48,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1935622507, now seen corresponding path program 64 times [2022-03-15 21:27:48,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:48,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078035538] [2022-03-15 21:27:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:48,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:48,720 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 21:27:48,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:48,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078035538] [2022-03-15 21:27:48,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078035538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:48,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24635580] [2022-03-15 21:27:48,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:48,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:48,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:48,722 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 21:27:48,722 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 21:27:48,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:48,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:48,928 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 21:27:48,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:49,096 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 21:27:49,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24635580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:49,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:49,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2022-03-15 21:27:49,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1198176378] [2022-03-15 21:27:49,096 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:49,097 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:49,099 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 21:27:49,099 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:49,168 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [37498#(or (< (+ i1 1) N1) (<= N1 i1)), 37455#(< i1 N1), 37499#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:27:49,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:27:49,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:49,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:27:49,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:27:49,169 INFO L87 Difference]: Start difference. First operand 269 states and 696 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 21:27:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:49,375 INFO L93 Difference]: Finished difference Result 363 states and 836 transitions. [2022-03-15 21:27:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:27:49,376 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 17 [2022-03-15 21:27:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:49,377 INFO L225 Difference]: With dead ends: 363 [2022-03-15 21:27:49,377 INFO L226 Difference]: Without dead ends: 363 [2022-03-15 21:27:49,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=367, Invalid=1355, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:27:49,377 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 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 21:27:49,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:49,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-03-15 21:27:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 275. [2022-03-15 21:27:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.605839416058394) internal successors, (714), 274 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 714 transitions. [2022-03-15 21:27:49,381 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 714 transitions. Word has length 17 [2022-03-15 21:27:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:49,382 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 714 transitions. [2022-03-15 21:27:49,382 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 21:27:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 714 transitions. [2022-03-15 21:27:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:49,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:49,382 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:49,398 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 21:27:49,582 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 21:27:49,583 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2069842061, now seen corresponding path program 65 times [2022-03-15 21:27:49,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:49,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165035293] [2022-03-15 21:27:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:49,659 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 21:27:49,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:49,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165035293] [2022-03-15 21:27:49,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165035293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:49,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025830078] [2022-03-15 21:27:49,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:49,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:49,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:49,661 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 21:27:49,662 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 21:27:49,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:27:49,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:49,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:49,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:49,891 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 21:27:49,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:50,059 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 21:27:50,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025830078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:50,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:50,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2022-03-15 21:27:50,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [782918995] [2022-03-15 21:27:50,060 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:50,061 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:50,063 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2022-03-15 21:27:50,063 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:50,091 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38556#(< i1 N1)] [2022-03-15 21:27:50,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:27:50,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:50,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:27:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:27:50,095 INFO L87 Difference]: Start difference. First operand 275 states and 714 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 21:27:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:50,270 INFO L93 Difference]: Finished difference Result 382 states and 889 transitions. [2022-03-15 21:27:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:27:50,271 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 17 [2022-03-15 21:27:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:50,272 INFO L225 Difference]: With dead ends: 382 [2022-03-15 21:27:50,272 INFO L226 Difference]: Without dead ends: 378 [2022-03-15 21:27:50,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:27:50,272 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:50,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-15 21:27:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 275. [2022-03-15 21:27:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.5875912408759123) internal successors, (709), 274 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 709 transitions. [2022-03-15 21:27:50,280 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 709 transitions. Word has length 17 [2022-03-15 21:27:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:50,280 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 709 transitions. [2022-03-15 21:27:50,280 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 21:27:50,280 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 709 transitions. [2022-03-15 21:27:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:50,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:50,281 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:50,303 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 21:27:50,495 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 21:27:50,495 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2130585910, now seen corresponding path program 66 times [2022-03-15 21:27:50,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:50,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200556467] [2022-03-15 21:27:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:50,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:50,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200556467] [2022-03-15 21:27:50,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200556467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:50,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574619156] [2022-03-15 21:27:50,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:50,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:50,575 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 21:27:50,577 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 21:27:50,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:27:50,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:50,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:50,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:50,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574619156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:50,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:50,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 27 [2022-03-15 21:27:50,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1589776891] [2022-03-15 21:27:50,924 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:50,925 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:50,934 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:27:50,934 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:51,051 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [39636#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 39637#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 39634#(or (< (+ i1 1) N1) (<= N1 i1)), 39633#(< i1 N1), 39635#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:27:51,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:27:51,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:51,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:27:51,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:27:51,052 INFO L87 Difference]: Start difference. First operand 275 states and 709 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 21:27:51,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:51,507 INFO L93 Difference]: Finished difference Result 402 states and 895 transitions. [2022-03-15 21:27:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:27:51,507 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 17 [2022-03-15 21:27:51,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:51,508 INFO L225 Difference]: With dead ends: 402 [2022-03-15 21:27:51,508 INFO L226 Difference]: Without dead ends: 395 [2022-03-15 21:27:51,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=575, Invalid=2181, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:27:51,509 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:51,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-03-15 21:27:51,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 279. [2022-03-15 21:27:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.579136690647482) internal successors, (717), 278 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 717 transitions. [2022-03-15 21:27:51,515 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 717 transitions. Word has length 17 [2022-03-15 21:27:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:51,515 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 717 transitions. [2022-03-15 21:27:51,515 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 21:27:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 717 transitions. [2022-03-15 21:27:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:51,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:51,516 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:51,533 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 21:27:51,723 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 21:27:51,723 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1276877705, now seen corresponding path program 67 times [2022-03-15 21:27:51,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:51,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729257821] [2022-03-15 21:27:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:51,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:51,799 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 21:27:51,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:51,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729257821] [2022-03-15 21:27:51,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729257821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:51,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000768310] [2022-03-15 21:27:51,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:51,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:51,801 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 21:27:51,827 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 21:27:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:51,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:51,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:52,012 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 21:27:52,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:52,182 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 21:27:52,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000768310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:52,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:52,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2022-03-15 21:27:52,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2095404964] [2022-03-15 21:27:52,183 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:52,184 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:52,186 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2022-03-15 21:27:52,186 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:52,219 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [40720#(< i1 N1), 40763#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:27:52,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:27:52,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:52,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:27:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:27:52,219 INFO L87 Difference]: Start difference. First operand 279 states and 717 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:52,365 INFO L93 Difference]: Finished difference Result 371 states and 851 transitions. [2022-03-15 21:27:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:27:52,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:27:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:52,366 INFO L225 Difference]: With dead ends: 371 [2022-03-15 21:27:52,366 INFO L226 Difference]: Without dead ends: 369 [2022-03-15 21:27:52,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=1107, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:27:52,367 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:52,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-15 21:27:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 278. [2022-03-15 21:27:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.577617328519856) internal successors, (714), 277 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 714 transitions. [2022-03-15 21:27:52,372 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 714 transitions. Word has length 17 [2022-03-15 21:27:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:52,372 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 714 transitions. [2022-03-15 21:27:52,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 714 transitions. [2022-03-15 21:27:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:52,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:52,373 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:52,395 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 21:27:52,588 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 21:27:52,588 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash -421571051, now seen corresponding path program 68 times [2022-03-15 21:27:52,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:52,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306165637] [2022-03-15 21:27:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:52,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:52,672 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 21:27:52,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:52,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306165637] [2022-03-15 21:27:52,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306165637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:52,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137733120] [2022-03-15 21:27:52,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:52,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:52,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:52,673 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 21:27:52,674 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 21:27:52,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:52,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:52,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:52,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:52,857 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 21:27:52,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:53,020 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 21:27:53,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137733120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:53,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:53,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2022-03-15 21:27:53,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1736083624] [2022-03-15 21:27:53,021 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:53,022 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:53,024 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2022-03-15 21:27:53,024 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:53,082 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [41833#(or (< (+ i1 1) N1) (<= N1 i1)), 41834#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 41790#(< i1 N1)] [2022-03-15 21:27:53,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:27:53,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:53,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:27:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:27:53,082 INFO L87 Difference]: Start difference. First operand 278 states and 714 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:53,245 INFO L93 Difference]: Finished difference Result 333 states and 780 transitions. [2022-03-15 21:27:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:27:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:27:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:53,247 INFO L225 Difference]: With dead ends: 333 [2022-03-15 21:27:53,247 INFO L226 Difference]: Without dead ends: 333 [2022-03-15 21:27:53,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:27:53,247 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:53,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-15 21:27:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 265. [2022-03-15 21:27:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.5833333333333335) internal successors, (682), 264 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 682 transitions. [2022-03-15 21:27:53,252 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 682 transitions. Word has length 17 [2022-03-15 21:27:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:53,252 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 682 transitions. [2022-03-15 21:27:53,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 682 transitions. [2022-03-15 21:27:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:53,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:53,253 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:53,268 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 21:27:53,453 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 21:27:53,453 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:53,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:53,454 INFO L85 PathProgramCache]: Analyzing trace with hash 323131447, now seen corresponding path program 69 times [2022-03-15 21:27:53,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:53,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296533174] [2022-03-15 21:27:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:53,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:53,546 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 21:27:53,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:53,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296533174] [2022-03-15 21:27:53,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296533174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:53,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976444958] [2022-03-15 21:27:53,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:53,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:53,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:53,547 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 21:27:53,548 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 21:27:53,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:27:53,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:53,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:53,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:53,727 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 21:27:53,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:53,894 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 21:27:53,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976444958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:53,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:53,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2022-03-15 21:27:53,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1618561867] [2022-03-15 21:27:53,894 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:53,895 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:53,897 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 21:27:53,897 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:53,984 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [42798#(< i1 N1), 42843#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 42841#(or (< (+ i1 1) N1) (<= N1 i1)), 42842#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:27:53,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:27:53,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:53,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:27:53,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:27:53,984 INFO L87 Difference]: Start difference. First operand 265 states and 682 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:54,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:54,204 INFO L93 Difference]: Finished difference Result 332 states and 771 transitions. [2022-03-15 21:27:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:27:54,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:27:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:54,206 INFO L225 Difference]: With dead ends: 332 [2022-03-15 21:27:54,206 INFO L226 Difference]: Without dead ends: 332 [2022-03-15 21:27:54,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1627, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:27:54,206 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:54,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-15 21:27:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 257. [2022-03-15 21:27:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.5625) internal successors, (656), 256 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 656 transitions. [2022-03-15 21:27:54,211 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 656 transitions. Word has length 17 [2022-03-15 21:27:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:54,212 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 656 transitions. [2022-03-15 21:27:54,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 656 transitions. [2022-03-15 21:27:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:54,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:54,212 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:54,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-15 21:27:54,415 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 21:27:54,415 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2140028715, now seen corresponding path program 70 times [2022-03-15 21:27:54,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:54,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361172316] [2022-03-15 21:27:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:54,490 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 21:27:54,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:54,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361172316] [2022-03-15 21:27:54,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361172316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:54,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359866054] [2022-03-15 21:27:54,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:54,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:54,492 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 21:27:54,493 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 21:27:54,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:54,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:54,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:54,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:54,676 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 21:27:54,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:54,789 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 21:27:54,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359866054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:54,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:54,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-03-15 21:27:54,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1264584640] [2022-03-15 21:27:54,790 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:54,791 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:54,793 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 37 transitions. [2022-03-15 21:27:54,794 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:54,922 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [43839#(or (<= N2 (+ i2 1)) (< i1 N1)), 43838#(or (<= N2 i2) (< i1 N1)), 43837#(< i1 N1), 43840#(or (< i1 N1) (<= N2 (+ 2 i2)))] [2022-03-15 21:27:54,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:27:54,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:27:54,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:27:54,922 INFO L87 Difference]: Start difference. First operand 257 states and 656 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:55,094 INFO L93 Difference]: Finished difference Result 323 states and 745 transitions. [2022-03-15 21:27:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:27:55,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:27:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:55,096 INFO L225 Difference]: With dead ends: 323 [2022-03-15 21:27:55,096 INFO L226 Difference]: Without dead ends: 315 [2022-03-15 21:27:55,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:27:55,096 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:55,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-03-15 21:27:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 228. [2022-03-15 21:27:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.5814977973568283) internal successors, (586), 227 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:55,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 586 transitions. [2022-03-15 21:27:55,102 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 586 transitions. Word has length 17 [2022-03-15 21:27:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:55,102 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 586 transitions. [2022-03-15 21:27:55,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 586 transitions. [2022-03-15 21:27:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:55,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:55,102 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:55,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:55,310 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 21:27:55,311 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:55,311 INFO L85 PathProgramCache]: Analyzing trace with hash -701254772, now seen corresponding path program 71 times [2022-03-15 21:27:55,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:55,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983873931] [2022-03-15 21:27:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:55,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:55,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:55,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983873931] [2022-03-15 21:27:55,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983873931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:55,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943090712] [2022-03-15 21:27:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:55,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:55,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:55,407 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 21:27:55,434 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 21:27:55,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:27:55,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:55,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:55,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:55,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:55,764 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 21:27:55,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943090712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:55,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:55,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-15 21:27:55,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1119658063] [2022-03-15 21:27:55,765 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:55,766 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:55,770 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2022-03-15 21:27:55,770 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:55,896 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [44765#(or (< i1 N1) (<= (+ 3 i2) N2)), 44762#(< i1 N1), 44764#(or (< i1 N1) (<= (+ 2 i2) N2)), 44763#(or (< i2 N2) (< i1 N1))] [2022-03-15 21:27:55,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:27:55,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:27:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:27:55,897 INFO L87 Difference]: Start difference. First operand 228 states and 586 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:56,063 INFO L93 Difference]: Finished difference Result 320 states and 718 transitions. [2022-03-15 21:27:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:27:56,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:27:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:56,064 INFO L225 Difference]: With dead ends: 320 [2022-03-15 21:27:56,064 INFO L226 Difference]: Without dead ends: 310 [2022-03-15 21:27:56,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=1154, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:27:56,064 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:56,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-03-15 21:27:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 226. [2022-03-15 21:27:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.542222222222222) internal successors, (572), 225 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 572 transitions. [2022-03-15 21:27:56,068 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 572 transitions. Word has length 17 [2022-03-15 21:27:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:56,068 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 572 transitions. [2022-03-15 21:27:56,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 572 transitions. [2022-03-15 21:27:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:56,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:56,068 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:56,084 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 21:27:56,269 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 21:27:56,269 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:56,269 INFO L85 PathProgramCache]: Analyzing trace with hash -994657779, now seen corresponding path program 72 times [2022-03-15 21:27:56,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:56,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293976965] [2022-03-15 21:27:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:56,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:56,338 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 21:27:56,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:56,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293976965] [2022-03-15 21:27:56,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293976965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:56,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486233878] [2022-03-15 21:27:56,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:56,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:56,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:56,340 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 21:27:56,340 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 21:27:56,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:27:56,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:56,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:56,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:56,523 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 21:27:56,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:56,645 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 21:27:56,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486233878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:56,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:56,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2022-03-15 21:27:56,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2118089265] [2022-03-15 21:27:56,645 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:56,646 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:56,649 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2022-03-15 21:27:56,649 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:56,738 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [45676#(or (<= N2 i2) (< i1 N1)), 45675#(< i1 N1), 45677#(or (<= N2 (+ i2 1)) (< i1 N1))] [2022-03-15 21:27:56,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:27:56,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:56,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:27:56,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:27:56,739 INFO L87 Difference]: Start difference. First operand 226 states and 572 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 21:27:56,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:56,914 INFO L93 Difference]: Finished difference Result 285 states and 654 transitions. [2022-03-15 21:27:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:27:56,915 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 21:27:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:56,915 INFO L225 Difference]: With dead ends: 285 [2022-03-15 21:27:56,916 INFO L226 Difference]: Without dead ends: 279 [2022-03-15 21:27:56,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=420, Invalid=1140, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:27:56,916 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:56,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-15 21:27:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 216. [2022-03-15 21:27:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.567441860465116) internal successors, (552), 215 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 552 transitions. [2022-03-15 21:27:56,919 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 552 transitions. Word has length 17 [2022-03-15 21:27:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:56,919 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 552 transitions. [2022-03-15 21:27:56,919 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 21:27:56,919 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 552 transitions. [2022-03-15 21:27:56,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:56,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:56,920 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:56,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-15 21:27:57,120 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 21:27:57,120 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:57,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1545606262, now seen corresponding path program 73 times [2022-03-15 21:27:57,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:57,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395856557] [2022-03-15 21:27:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:57,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:57,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:57,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395856557] [2022-03-15 21:27:57,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395856557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:57,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217783325] [2022-03-15 21:27:57,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:57,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:57,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:57,208 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 21:27:57,209 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 21:27:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:57,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:57,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:57,554 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 21:27:57,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217783325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:57,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:57,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-15 21:27:57,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1589391839] [2022-03-15 21:27:57,555 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:57,556 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:57,559 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 21:27:57,559 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:57,643 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [46541#(or (< i1 N1) (<= (+ 2 i2) N2)), 46540#(or (< i2 N2) (< i1 N1)), 46539#(< i1 N1)] [2022-03-15 21:27:57,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:27:57,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:57,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:27:57,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:27:57,643 INFO L87 Difference]: Start difference. First operand 216 states and 552 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:57,764 INFO L93 Difference]: Finished difference Result 324 states and 711 transitions. [2022-03-15 21:27:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:27:57,764 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:27:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:57,765 INFO L225 Difference]: With dead ends: 324 [2022-03-15 21:27:57,765 INFO L226 Difference]: Without dead ends: 320 [2022-03-15 21:27:57,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:27:57,765 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:57,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:57,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-03-15 21:27:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 216. [2022-03-15 21:27:57,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.5441860465116277) internal successors, (547), 215 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 547 transitions. [2022-03-15 21:27:57,769 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 547 transitions. Word has length 17 [2022-03-15 21:27:57,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:57,769 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 547 transitions. [2022-03-15 21:27:57,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 547 transitions. [2022-03-15 21:27:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:57,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:57,770 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:57,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-15 21:27:57,975 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 21:27:57,975 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1674688981, now seen corresponding path program 74 times [2022-03-15 21:27:57,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:57,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138774030] [2022-03-15 21:27:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:57,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:58,035 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 21:27:58,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:58,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138774030] [2022-03-15 21:27:58,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138774030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:58,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714054784] [2022-03-15 21:27:58,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:58,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:58,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:58,037 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 21:27:58,038 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 21:27:58,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:58,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:58,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:58,247 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 21:27:58,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:58,384 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 21:27:58,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714054784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:58,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:58,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 26 [2022-03-15 21:27:58,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [733063756] [2022-03-15 21:27:58,384 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:58,386 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:58,388 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 21:27:58,388 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:58,441 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [47431#(< i1 N1), 47432#(or (<= N2 i2) (< i1 N1))] [2022-03-15 21:27:58,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:27:58,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:58,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:27:58,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:27:58,442 INFO L87 Difference]: Start difference. First operand 216 states and 547 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 21:27:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:58,609 INFO L93 Difference]: Finished difference Result 268 states and 620 transitions. [2022-03-15 21:27:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:27:58,609 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 21:27:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:58,610 INFO L225 Difference]: With dead ends: 268 [2022-03-15 21:27:58,610 INFO L226 Difference]: Without dead ends: 264 [2022-03-15 21:27:58,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:27:58,610 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:58,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-15 21:27:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 212. [2022-03-15 21:27:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.5545023696682465) internal successors, (539), 211 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 539 transitions. [2022-03-15 21:27:58,613 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 539 transitions. Word has length 17 [2022-03-15 21:27:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:58,614 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 539 transitions. [2022-03-15 21:27:58,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 21:27:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 539 transitions. [2022-03-15 21:27:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:58,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:58,614 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:58,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 21:27:58,814 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 21:27:58,815 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash -737218996, now seen corresponding path program 75 times [2022-03-15 21:27:58,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:58,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775647597] [2022-03-15 21:27:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:58,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:58,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:58,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775647597] [2022-03-15 21:27:58,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775647597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:58,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234624603] [2022-03-15 21:27:58,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:58,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:58,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:58,898 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 21:27:58,899 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 21:27:58,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:27:58,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:58,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:58,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:59,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:59,244 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 21:27:59,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234624603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:59,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:59,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-03-15 21:27:59,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2071081863] [2022-03-15 21:27:59,245 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:59,247 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:59,249 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2022-03-15 21:27:59,249 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:59,300 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [48272#(or (< i2 N2) (< i1 N1)), 48271#(< i1 N1)] [2022-03-15 21:27:59,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:27:59,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:59,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:27:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:27:59,301 INFO L87 Difference]: Start difference. First operand 212 states and 539 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 21:27:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:59,388 INFO L93 Difference]: Finished difference Result 322 states and 705 transitions. [2022-03-15 21:27:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:27:59,389 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 17 [2022-03-15 21:27:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:59,390 INFO L225 Difference]: With dead ends: 322 [2022-03-15 21:27:59,390 INFO L226 Difference]: Without dead ends: 322 [2022-03-15 21:27:59,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:27:59,390 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:59,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-15 21:27:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 216. [2022-03-15 21:27:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.562790697674419) internal successors, (551), 215 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 551 transitions. [2022-03-15 21:27:59,394 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 551 transitions. Word has length 17 [2022-03-15 21:27:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:59,394 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 551 transitions. [2022-03-15 21:27:59,394 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 21:27:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 551 transitions. [2022-03-15 21:27:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:27:59,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:59,395 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:59,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 21:27:59,599 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 21:27:59,599 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1760796941, now seen corresponding path program 76 times [2022-03-15 21:27:59,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:59,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372035934] [2022-03-15 21:27:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:59,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:59,667 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 21:27:59,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:59,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372035934] [2022-03-15 21:27:59,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372035934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:59,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075436082] [2022-03-15 21:27:59,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:59,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:59,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:59,669 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 21:27:59,669 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 21:27:59,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:59,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:27:59,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:59,848 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 21:27:59,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:59,995 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 21:27:59,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075436082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:59,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:59,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2022-03-15 21:27:59,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [58014879] [2022-03-15 21:27:59,995 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:59,997 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:59,998 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2022-03-15 21:27:59,998 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:00,020 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49156#(< i1 N1)] [2022-03-15 21:28:00,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:28:00,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:00,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:28:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:28:00,021 INFO L87 Difference]: Start difference. First operand 216 states and 551 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 21:28:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:00,197 INFO L93 Difference]: Finished difference Result 267 states and 638 transitions. [2022-03-15 21:28:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:28:00,198 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 21:28:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:00,199 INFO L225 Difference]: With dead ends: 267 [2022-03-15 21:28:00,199 INFO L226 Difference]: Without dead ends: 265 [2022-03-15 21:28:00,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:28:00,199 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:00,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-15 21:28:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 223. [2022-03-15 21:28:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.5945945945945947) internal successors, (576), 222 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 576 transitions. [2022-03-15 21:28:00,204 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 576 transitions. Word has length 17 [2022-03-15 21:28:00,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:00,204 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 576 transitions. [2022-03-15 21:28:00,204 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 21:28:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 576 transitions. [2022-03-15 21:28:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:28:00,204 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:00,204 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:00,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-15 21:28:00,415 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 21:28:00,415 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1821540790, now seen corresponding path program 77 times [2022-03-15 21:28:00,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:00,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85204550] [2022-03-15 21:28:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:00,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:00,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:00,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85204550] [2022-03-15 21:28:00,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85204550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:00,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112897098] [2022-03-15 21:28:00,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:00,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:00,488 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 21:28:00,489 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 21:28:00,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:28:00,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:28:00,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:00,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:00,864 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 21:28:00,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112897098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:00,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:00,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 27 [2022-03-15 21:28:00,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [432345624] [2022-03-15 21:28:00,865 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:00,866 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:00,868 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:28:00,868 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:01,009 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [50020#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 50023#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 50019#(or (< (+ i1 1) N1) (<= N1 i1)), 50018#(< i1 N1), 50021#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 50022#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1))] [2022-03-15 21:28:01,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:28:01,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:01,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:28:01,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:28:01,010 INFO L87 Difference]: Start difference. First operand 223 states and 576 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:01,699 INFO L93 Difference]: Finished difference Result 373 states and 807 transitions. [2022-03-15 21:28:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:28:01,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:28:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:01,700 INFO L225 Difference]: With dead ends: 373 [2022-03-15 21:28:01,700 INFO L226 Difference]: Without dead ends: 373 [2022-03-15 21:28:01,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=792, Invalid=2868, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:28:01,701 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:01,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-03-15 21:28:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 238. [2022-03-15 21:28:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.586497890295359) internal successors, (613), 237 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 613 transitions. [2022-03-15 21:28:01,706 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 613 transitions. Word has length 17 [2022-03-15 21:28:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:01,706 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 613 transitions. [2022-03-15 21:28:01,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 613 transitions. [2022-03-15 21:28:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:28:01,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:01,707 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:01,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-15 21:28:01,915 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 21:28:01,915 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:01,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1585922825, now seen corresponding path program 78 times [2022-03-15 21:28:01,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:01,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511893764] [2022-03-15 21:28:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:01,988 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 21:28:01,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:01,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511893764] [2022-03-15 21:28:01,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511893764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:01,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020529433] [2022-03-15 21:28:01,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:01,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:01,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:01,989 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 21:28:01,990 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 21:28:02,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:28:02,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:02,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:28:02,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:02,168 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 21:28:02,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:02,334 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 21:28:02,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020529433] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:02,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:02,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2022-03-15 21:28:02,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1336861449] [2022-03-15 21:28:02,335 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:02,336 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:02,338 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2022-03-15 21:28:02,338 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:02,367 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [51009#(< i1 N1), 51052#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:02,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:28:02,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:02,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:28:02,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:28:02,368 INFO L87 Difference]: Start difference. First operand 238 states and 613 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 21:28:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:02,506 INFO L93 Difference]: Finished difference Result 302 states and 705 transitions. [2022-03-15 21:28:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:28:02,506 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 17 [2022-03-15 21:28:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:02,507 INFO L225 Difference]: With dead ends: 302 [2022-03-15 21:28:02,507 INFO L226 Difference]: Without dead ends: 302 [2022-03-15 21:28:02,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:28:02,508 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:02,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-15 21:28:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 238. [2022-03-15 21:28:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.586497890295359) internal successors, (613), 237 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 613 transitions. [2022-03-15 21:28:02,511 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 613 transitions. Word has length 17 [2022-03-15 21:28:02,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:02,511 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 613 transitions. [2022-03-15 21:28:02,511 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 21:28:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 613 transitions. [2022-03-15 21:28:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:28:02,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:02,512 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:02,527 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 21:28:02,712 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 21:28:02,712 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:02,713 INFO L85 PathProgramCache]: Analyzing trace with hash -730616171, now seen corresponding path program 79 times [2022-03-15 21:28:02,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:02,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907108022] [2022-03-15 21:28:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:02,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:02,805 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 21:28:02,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:02,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907108022] [2022-03-15 21:28:02,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907108022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:02,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228176425] [2022-03-15 21:28:02,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:02,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:02,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:02,807 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 21:28:02,807 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 21:28:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:28:02,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:02,991 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 21:28:02,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:03,151 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 21:28:03,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228176425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:03,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:03,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2022-03-15 21:28:03,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [672099083] [2022-03-15 21:28:03,151 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:03,152 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:03,154 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2022-03-15 21:28:03,154 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:03,207 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [51974#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 51930#(< i1 N1), 51973#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:03,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:28:03,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:03,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:28:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:28:03,208 INFO L87 Difference]: Start difference. First operand 238 states and 613 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:03,385 INFO L93 Difference]: Finished difference Result 302 states and 703 transitions. [2022-03-15 21:28:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:28:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:28:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:03,386 INFO L225 Difference]: With dead ends: 302 [2022-03-15 21:28:03,386 INFO L226 Difference]: Without dead ends: 302 [2022-03-15 21:28:03,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:28:03,387 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:03,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:03,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-15 21:28:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 238. [2022-03-15 21:28:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.586497890295359) internal successors, (613), 237 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 613 transitions. [2022-03-15 21:28:03,391 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 613 transitions. Word has length 17 [2022-03-15 21:28:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:03,391 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 613 transitions. [2022-03-15 21:28:03,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 613 transitions. [2022-03-15 21:28:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:28:03,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:03,392 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:03,407 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 21:28:03,592 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 21:28:03,592 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash 14086327, now seen corresponding path program 80 times [2022-03-15 21:28:03,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:03,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334095988] [2022-03-15 21:28:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:03,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:03,696 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 21:28:03,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:03,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334095988] [2022-03-15 21:28:03,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334095988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:03,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802954945] [2022-03-15 21:28:03,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:03,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:03,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:03,697 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 21:28:03,698 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 21:28:03,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:03,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:03,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:28:03,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:03,884 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 21:28:03,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:04,045 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 21:28:04,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802954945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:04,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:04,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2022-03-15 21:28:04,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [621587898] [2022-03-15 21:28:04,046 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:04,047 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:04,049 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2022-03-15 21:28:04,049 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:04,132 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [52855#(< i1 N1), 52899#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 52898#(or (< (+ i1 1) N1) (<= N1 i1)), 52900#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:28:04,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:28:04,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:04,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:28:04,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:28:04,133 INFO L87 Difference]: Start difference. First operand 238 states and 613 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:28:04,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:04,268 INFO L93 Difference]: Finished difference Result 272 states and 646 transitions. [2022-03-15 21:28:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:28:04,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:28:04,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:04,270 INFO L225 Difference]: With dead ends: 272 [2022-03-15 21:28:04,270 INFO L226 Difference]: Without dead ends: 272 [2022-03-15 21:28:04,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:28:04,270 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:04,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:04,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-15 21:28:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 224. [2022-03-15 21:28:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6053811659192827) internal successors, (581), 223 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 581 transitions. [2022-03-15 21:28:04,273 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 581 transitions. Word has length 17 [2022-03-15 21:28:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:04,274 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 581 transitions. [2022-03-15 21:28:04,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21:28:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 581 transitions. [2022-03-15 21:28:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:28:04,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:04,274 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:04,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-15 21:28:04,474 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 21:28:04,475 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1625027285, now seen corresponding path program 81 times [2022-03-15 21:28:04,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:04,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978512901] [2022-03-15 21:28:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:04,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:04,572 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 21:28:04,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:04,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978512901] [2022-03-15 21:28:04,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978512901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:04,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347036634] [2022-03-15 21:28:04,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:04,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:04,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:04,573 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 21:28:04,574 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 21:28:04,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:28:04,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:04,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:28:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:04,757 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 21:28:04,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:04,932 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 21:28:04,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347036634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:04,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:04,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-03-15 21:28:04,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [508852247] [2022-03-15 21:28:04,933 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:04,933 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:04,935 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 21:28:04,936 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:05,046 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [53718#(< i1 N1), 53762#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 53761#(or (< (+ i1 1) N1) (<= N1 i1)), 53764#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 53763#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:28:05,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:28:05,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:05,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:28:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:28:05,046 INFO L87 Difference]: Start difference. First operand 224 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:28:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:05,275 INFO L93 Difference]: Finished difference Result 264 states and 632 transitions. [2022-03-15 21:28:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:28:05,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:28:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:05,276 INFO L225 Difference]: With dead ends: 264 [2022-03-15 21:28:05,276 INFO L226 Difference]: Without dead ends: 264 [2022-03-15 21:28:05,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1726, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:28:05,277 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:05,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-15 21:28:05,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 229. [2022-03-15 21:28:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.6140350877192984) internal successors, (596), 228 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 596 transitions. [2022-03-15 21:28:05,280 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 596 transitions. Word has length 17 [2022-03-15 21:28:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:05,280 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 596 transitions. [2022-03-15 21:28:05,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 21:28:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 596 transitions. [2022-03-15 21:28:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:28:05,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:05,281 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:05,296 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 21:28:05,481 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 21:28:05,482 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash 871011705, now seen corresponding path program 82 times [2022-03-15 21:28:05,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:05,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311660588] [2022-03-15 21:28:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:05,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:05,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:05,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311660588] [2022-03-15 21:28:05,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311660588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:05,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85488970] [2022-03-15 21:28:05,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:05,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:05,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:05,527 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 21:28:05,528 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 21:28:05,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:05,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:05,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:28:05,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:05,654 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-03-15 21:28:05,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2022-03-15 21:28:08,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:08,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 147 [2022-03-15 21:28:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:08,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:08,534 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-03-15 21:28:08,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 108 [2022-03-15 21:28:08,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:08,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 176 treesize of output 152 [2022-03-15 21:28:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:08,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85488970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:08,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:08,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 19 [2022-03-15 21:28:08,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [797747762] [2022-03-15 21:28:08,701 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:08,702 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:08,705 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 54 transitions. [2022-03-15 21:28:08,705 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:08,848 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:28:08,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:28:08,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:08,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:28:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:28:08,849 INFO L87 Difference]: Start difference. First operand 229 states and 596 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 21:28:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:08,952 INFO L93 Difference]: Finished difference Result 307 states and 742 transitions. [2022-03-15 21:28:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:28:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:28:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:08,954 INFO L225 Difference]: With dead ends: 307 [2022-03-15 21:28:08,954 INFO L226 Difference]: Without dead ends: 304 [2022-03-15 21:28:08,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:28:08,954 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:08,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-03-15 21:28:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 267. [2022-03-15 21:28:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.612781954887218) internal successors, (695), 266 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 695 transitions. [2022-03-15 21:28:08,958 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 695 transitions. Word has length 18 [2022-03-15 21:28:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:08,958 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 695 transitions. [2022-03-15 21:28:08,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 21:28:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 695 transitions. [2022-03-15 21:28:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:28:08,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:08,959 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:08,982 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 21:28:09,181 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 21:28:09,182 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:09,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1314367773, now seen corresponding path program 83 times [2022-03-15 21:28:09,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:09,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964860902] [2022-03-15 21:28:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:09,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:28:09,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:09,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964860902] [2022-03-15 21:28:09,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964860902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:09,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728787321] [2022-03-15 21:28:09,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:09,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:09,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:09,222 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 21:28:09,223 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 21:28:09,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:28:09,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:09,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:28:09,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:09,478 INFO L353 Elim1Store]: treesize reduction 269, result has 26.3 percent of original size [2022-03-15 21:28:09,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 140 [2022-03-15 21:28:09,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:09,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 144 [2022-03-15 21:28:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:09,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:09,899 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-03-15 21:28:09,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 114 [2022-03-15 21:28:09,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:09,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 152 [2022-03-15 21:28:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:10,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728787321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:10,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:10,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 23 [2022-03-15 21:28:10,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1988814524] [2022-03-15 21:28:10,030 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:10,031 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:10,033 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 21:28:10,033 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:10,091 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55600#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:28:10,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:28:10,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:28:10,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:28:10,091 INFO L87 Difference]: Start difference. First operand 267 states and 695 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 21:28:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:10,212 INFO L93 Difference]: Finished difference Result 380 states and 921 transitions. [2022-03-15 21:28:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:28:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:28:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:10,213 INFO L225 Difference]: With dead ends: 380 [2022-03-15 21:28:10,214 INFO L226 Difference]: Without dead ends: 377 [2022-03-15 21:28:10,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:28:10,214 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:10,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-15 21:28:10,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 305. [2022-03-15 21:28:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6809210526315788) internal successors, (815), 304 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 815 transitions. [2022-03-15 21:28:10,220 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 815 transitions. Word has length 18 [2022-03-15 21:28:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:10,220 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 815 transitions. [2022-03-15 21:28:10,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 21:28:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 815 transitions. [2022-03-15 21:28:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:28:10,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:10,221 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:10,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 21:28:10,421 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 21:28:10,421 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:10,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2072788735, now seen corresponding path program 84 times [2022-03-15 21:28:10,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:10,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12791] [2022-03-15 21:28:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:10,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:28:10,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:10,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12791] [2022-03-15 21:28:10,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:10,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208607700] [2022-03-15 21:28:10,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:10,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:10,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:10,461 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 21:28:10,462 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 21:28:10,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:28:10,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:10,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:28:10,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:10,713 INFO L353 Elim1Store]: treesize reduction 220, result has 28.8 percent of original size [2022-03-15 21:28:10,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 160 treesize of output 139 [2022-03-15 21:28:10,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:10,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 139 treesize of output 144 [2022-03-15 21:28:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:11,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:11,308 INFO L353 Elim1Store]: treesize reduction 68, result has 43.8 percent of original size [2022-03-15 21:28:11,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 128 treesize of output 134 [2022-03-15 21:28:11,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:11,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 152 [2022-03-15 21:28:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:11,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208607700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:11,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:11,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 23 [2022-03-15 21:28:11,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [957318051] [2022-03-15 21:28:11,450 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:11,451 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:11,453 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 21:28:11,453 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:11,529 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [56718#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0)), 56719#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter))))] [2022-03-15 21:28:11,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:28:11,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:11,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:28:11,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:28:11,529 INFO L87 Difference]: Start difference. First operand 305 states and 815 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:11,659 INFO L93 Difference]: Finished difference Result 420 states and 1041 transitions. [2022-03-15 21:28:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:28:11,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:28:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:11,661 INFO L225 Difference]: With dead ends: 420 [2022-03-15 21:28:11,661 INFO L226 Difference]: Without dead ends: 417 [2022-03-15 21:28:11,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:28:11,661 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:11,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-03-15 21:28:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 337. [2022-03-15 21:28:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.7351190476190474) internal successors, (919), 336 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 919 transitions. [2022-03-15 21:28:11,668 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 919 transitions. Word has length 18 [2022-03-15 21:28:11,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:11,668 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 919 transitions. [2022-03-15 21:28:11,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:11,668 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 919 transitions. [2022-03-15 21:28:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:28:11,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:11,669 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:11,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 21:28:11,869 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 21:28:11,869 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:11,869 INFO L85 PathProgramCache]: Analyzing trace with hash 185965219, now seen corresponding path program 85 times [2022-03-15 21:28:11,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:11,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413772640] [2022-03-15 21:28:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:11,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:28:11,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:11,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413772640] [2022-03-15 21:28:11,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413772640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:11,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684744367] [2022-03-15 21:28:11,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:11,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:11,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:11,916 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 21:28:11,922 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 21:28:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:28:11,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:12,088 INFO L353 Elim1Store]: treesize reduction 81, result has 46.4 percent of original size [2022-03-15 21:28:12,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 117 treesize of output 108 [2022-03-15 21:28:12,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:12,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 144 [2022-03-15 21:28:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:13,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:13,329 INFO L353 Elim1Store]: treesize reduction 112, result has 33.7 percent of original size [2022-03-15 21:28:13,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 128 treesize of output 150 [2022-03-15 21:28:13,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:13,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-03-15 21:28:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:13,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684744367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:13,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:13,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-03-15 21:28:13,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1097266844] [2022-03-15 21:28:13,502 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:13,503 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:13,505 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 21:28:13,506 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:13,600 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [57941#(or (not (= (select f_inv (select f counter)) counter)) (= (select f (select f (select f counter))) 0) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 57939#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0)), 57940#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter))))] [2022-03-15 21:28:13,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:28:13,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:13,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:28:13,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:28:13,601 INFO L87 Difference]: Start difference. First operand 337 states and 919 transitions. Second operand has 11 states, 10 states have (on average 2.6) 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 21:28:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:13,743 INFO L93 Difference]: Finished difference Result 454 states and 1146 transitions. [2022-03-15 21:28:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:28:13,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) 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 18 [2022-03-15 21:28:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:13,745 INFO L225 Difference]: With dead ends: 454 [2022-03-15 21:28:13,745 INFO L226 Difference]: Without dead ends: 451 [2022-03-15 21:28:13,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:28:13,746 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:13,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:13,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-03-15 21:28:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 369. [2022-03-15 21:28:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.782608695652174) internal successors, (1024), 368 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1024 transitions. [2022-03-15 21:28:13,752 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1024 transitions. Word has length 18 [2022-03-15 21:28:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:13,752 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1024 transitions. [2022-03-15 21:28:13,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) 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 21:28:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1024 transitions. [2022-03-15 21:28:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:28:13,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:13,753 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:13,768 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 21:28:13,953 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 21:28:13,953 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:13,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1487861057, now seen corresponding path program 86 times [2022-03-15 21:28:13,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:13,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302803521] [2022-03-15 21:28:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:13,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:28:13,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:13,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302803521] [2022-03-15 21:28:13,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302803521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:13,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251541021] [2022-03-15 21:28:13,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:13,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:13,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:13,996 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 21:28:13,998 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 21:28:14,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:14,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:14,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:28:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:14,137 INFO L353 Elim1Store]: treesize reduction 32, result has 64.0 percent of original size [2022-03-15 21:28:14,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 95 [2022-03-15 21:28:16,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:16,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 179 treesize of output 144 [2022-03-15 21:28:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:16,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:16,249 INFO L353 Elim1Store]: treesize reduction 164, result has 27.1 percent of original size [2022-03-15 21:28:16,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 120 treesize of output 162 [2022-03-15 21:28:16,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:16,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-03-15 21:28:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:16,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251541021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:16,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:16,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 20 [2022-03-15 21:28:16,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1178396934] [2022-03-15 21:28:16,404 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:16,405 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:16,408 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 21:28:16,408 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:16,546 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [59261#(or (not (= (select f (select f (select f counter))) (select f_inv (select f (select f (select f (select f counter))))))) (not (= (select f_inv (select f counter)) counter)) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter))) (= (select f (select f (select f (select f counter)))) 0)), 59259#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 59260#(or (not (= (select f_inv (select f counter)) counter)) (= (select f (select f (select f counter))) 0) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 59258#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:28:16,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:28:16,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:28:16,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:28:16,547 INFO L87 Difference]: Start difference. First operand 369 states and 1024 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 21:28:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:16,666 INFO L93 Difference]: Finished difference Result 479 states and 1227 transitions. [2022-03-15 21:28:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:28:16,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:28:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:16,667 INFO L225 Difference]: With dead ends: 479 [2022-03-15 21:28:16,667 INFO L226 Difference]: Without dead ends: 476 [2022-03-15 21:28:16,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:28:16,668 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 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 21:28:16,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:16,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-15 21:28:16,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 394. [2022-03-15 21:28:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.816793893129771) internal successors, (1107), 393 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1107 transitions. [2022-03-15 21:28:16,673 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1107 transitions. Word has length 18 [2022-03-15 21:28:16,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:16,673 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1107 transitions. [2022-03-15 21:28:16,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 21:28:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1107 transitions. [2022-03-15 21:28:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:28:16,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:16,674 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:16,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 21:28:16,874 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 21:28:16,874 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:16,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1103040925, now seen corresponding path program 87 times [2022-03-15 21:28:16,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:16,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69127541] [2022-03-15 21:28:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:16,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:16,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:16,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69127541] [2022-03-15 21:28:16,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69127541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:16,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021302468] [2022-03-15 21:28:16,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:16,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:16,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:16,921 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 21:28:16,922 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 21:28:16,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:28:16,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:16,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:28:16,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:17,260 INFO L353 Elim1Store]: treesize reduction 417, result has 21.2 percent of original size [2022-03-15 21:28:17,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 142 treesize of output 167 [2022-03-15 21:28:17,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:17,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 189 treesize of output 141 [2022-03-15 21:28:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:17,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:17,714 INFO L353 Elim1Store]: treesize reduction 72, result has 40.5 percent of original size [2022-03-15 21:28:17,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 148 treesize of output 134 [2022-03-15 21:28:17,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:28:17,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-03-15 21:28:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:17,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021302468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:17,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:17,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 24 [2022-03-15 21:28:17,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [708626868] [2022-03-15 21:28:17,885 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:17,886 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:17,888 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 21:28:17,888 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:17,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:28:17,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:28:17,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:28:17,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:28:17,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:28:17,961 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:28:17,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:28:17,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:17,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:28:17,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:28:17,962 INFO L87 Difference]: Start difference. First operand 394 states and 1107 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:18,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:18,065 INFO L93 Difference]: Finished difference Result 477 states and 1248 transitions. [2022-03-15 21:28:18,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:28:18,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:28:18,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:18,068 INFO L225 Difference]: With dead ends: 477 [2022-03-15 21:28:18,068 INFO L226 Difference]: Without dead ends: 474 [2022-03-15 21:28:18,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:28:18,068 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:18,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-15 21:28:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 411. [2022-03-15 21:28:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.8365853658536584) internal successors, (1163), 410 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1163 transitions. [2022-03-15 21:28:18,074 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1163 transitions. Word has length 18 [2022-03-15 21:28:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:18,075 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1163 transitions. [2022-03-15 21:28:18,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1163 transitions. [2022-03-15 21:28:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:28:18,075 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:18,075 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:18,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 21:28:18,276 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 21:28:18,276 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1396933530, now seen corresponding path program 88 times [2022-03-15 21:28:18,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:18,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083843019] [2022-03-15 21:28:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:18,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:18,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:18,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083843019] [2022-03-15 21:28:18,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083843019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:18,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606885236] [2022-03-15 21:28:18,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:18,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:18,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:18,380 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 21:28:18,381 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 21:28:18,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:18,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:18,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:28:18,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:18,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:18,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606885236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:18,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:18,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2022-03-15 21:28:18,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1780767947] [2022-03-15 21:28:18,698 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:18,699 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:18,702 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2022-03-15 21:28:18,702 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:18,845 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [62089#(or (<= N1 (+ i1 1)) (< i2 N2)), 62088#(or (< i2 N2) (<= N1 i1)), 62086#(< i2 N2), 62087#(or (< i2 N2) (<= (+ N1 1) i1)), 62090#(or (<= N1 (+ 2 i1)) (< i2 N2)), 62091#(or (<= N1 (+ 3 i1)) (< i2 N2))] [2022-03-15 21:28:18,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:28:18,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:28:18,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:28:18,846 INFO L87 Difference]: Start difference. First operand 411 states and 1163 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:19,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:19,067 INFO L93 Difference]: Finished difference Result 568 states and 1400 transitions. [2022-03-15 21:28:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:28:19,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:28:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:19,069 INFO L225 Difference]: With dead ends: 568 [2022-03-15 21:28:19,069 INFO L226 Difference]: Without dead ends: 553 [2022-03-15 21:28:19,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=516, Invalid=1464, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:28:19,069 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:19,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-03-15 21:28:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 342. [2022-03-15 21:28:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.8152492668621703) internal successors, (960), 341 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 960 transitions. [2022-03-15 21:28:19,076 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 960 transitions. Word has length 18 [2022-03-15 21:28:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:19,077 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 960 transitions. [2022-03-15 21:28:19,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 960 transitions. [2022-03-15 21:28:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:19,078 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:19,078 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:19,103 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 21:28:19,297 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 21:28:19,298 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:19,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1231536022, now seen corresponding path program 89 times [2022-03-15 21:28:19,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:19,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489174039] [2022-03-15 21:28:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:19,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:19,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:19,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489174039] [2022-03-15 21:28:19,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489174039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:19,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12829227] [2022-03-15 21:28:19,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:19,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:19,412 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 21:28:19,450 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 21:28:19,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:28:19,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:19,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:19,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12829227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:19,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:19,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 21:28:19,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [297215666] [2022-03-15 21:28:19,876 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:19,877 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:19,882 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 59 transitions. [2022-03-15 21:28:19,882 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:20,139 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [63507#(or (<= N2 i2) (< i1 N1)), 63508#(or (<= N2 (+ i2 1)) (< i1 N1)), 63509#(or (< i1 N1) (<= N2 (+ 2 i2))), 63510#(or (<= N2 (+ 3 i2)) (< i1 N1)), 63506#(< i1 N1), 63511#(or (< i1 N1) (<= N2 (+ i2 4)))] [2022-03-15 21:28:20,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:28:20,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:20,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:28:20,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:28:20,140 INFO L87 Difference]: Start difference. First operand 342 states and 960 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 21:28:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:20,435 INFO L93 Difference]: Finished difference Result 557 states and 1324 transitions. [2022-03-15 21:28:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:28:20,435 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 19 [2022-03-15 21:28:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:20,436 INFO L225 Difference]: With dead ends: 557 [2022-03-15 21:28:20,436 INFO L226 Difference]: Without dead ends: 544 [2022-03-15 21:28:20,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=682, Invalid=1868, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:28:20,437 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:20,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-03-15 21:28:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 373. [2022-03-15 21:28:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.6774193548387095) internal successors, (996), 372 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 996 transitions. [2022-03-15 21:28:20,446 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 996 transitions. Word has length 19 [2022-03-15 21:28:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:20,446 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 996 transitions. [2022-03-15 21:28:20,446 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 21:28:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 996 transitions. [2022-03-15 21:28:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:20,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:20,447 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:20,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:20,663 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 21:28:20,663 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash 913825933, now seen corresponding path program 90 times [2022-03-15 21:28:20,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:20,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735656134] [2022-03-15 21:28:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:20,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:20,788 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 21:28:20,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:20,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735656134] [2022-03-15 21:28:20,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735656134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:20,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787530791] [2022-03-15 21:28:20,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:20,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:20,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:20,795 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 21:28:20,796 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 21:28:20,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:28:20,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:20,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:21,063 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 21:28:21,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:21,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787530791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:21,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:21,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-15 21:28:21,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1180856277] [2022-03-15 21:28:21,217 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:21,218 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:21,223 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 57 transitions. [2022-03-15 21:28:21,223 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:21,529 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [64985#(or (< i1 N1) (<= (+ 3 i2) N2)), 64986#(or (<= (+ i2 4) N2) (< i1 N1)), 64983#(or (< i2 N2) (< i1 N1)), 64987#(or (< i1 N1) (<= (+ 5 i2) N2)), 64984#(or (< i1 N1) (<= (+ 2 i2) N2)), 64982#(< i1 N1)] [2022-03-15 21:28:21,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:28:21,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:21,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:28:21,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:28:21,530 INFO L87 Difference]: Start difference. First operand 373 states and 996 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:21,763 INFO L93 Difference]: Finished difference Result 479 states and 1149 transitions. [2022-03-15 21:28:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:28:21,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:28:21,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:21,764 INFO L225 Difference]: With dead ends: 479 [2022-03-15 21:28:21,764 INFO L226 Difference]: Without dead ends: 461 [2022-03-15 21:28:21,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=1922, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:28:21,764 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:21,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-03-15 21:28:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 367. [2022-03-15 21:28:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.6475409836065573) internal successors, (969), 366 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:21,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 969 transitions. [2022-03-15 21:28:21,769 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 969 transitions. Word has length 19 [2022-03-15 21:28:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:21,769 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 969 transitions. [2022-03-15 21:28:21,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 969 transitions. [2022-03-15 21:28:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:21,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:21,770 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:21,785 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 21:28:21,970 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 21:28:21,971 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:21,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1212336725, now seen corresponding path program 91 times [2022-03-15 21:28:21,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:21,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383509776] [2022-03-15 21:28:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:21,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:22,042 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 21:28:22,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:22,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383509776] [2022-03-15 21:28:22,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383509776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:22,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500112128] [2022-03-15 21:28:22,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:22,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:22,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:22,044 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 21:28:22,044 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 21:28:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:22,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:22,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:22,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500112128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:22,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:22,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2022-03-15 21:28:22,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1320438882] [2022-03-15 21:28:22,535 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:22,537 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:22,541 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:28:22,541 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:22,627 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [66363#(< i2 N2)] [2022-03-15 21:28:22,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:28:22,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:22,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:28:22,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:28:22,628 INFO L87 Difference]: Start difference. First operand 367 states and 969 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 21:28:22,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:22,856 INFO L93 Difference]: Finished difference Result 415 states and 1049 transitions. [2022-03-15 21:28:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:28:22,856 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 19 [2022-03-15 21:28:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:22,857 INFO L225 Difference]: With dead ends: 415 [2022-03-15 21:28:22,857 INFO L226 Difference]: Without dead ends: 414 [2022-03-15 21:28:22,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=592, Invalid=1664, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:28:22,858 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:22,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-03-15 21:28:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 367. [2022-03-15 21:28:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.6448087431693987) internal successors, (968), 366 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 968 transitions. [2022-03-15 21:28:22,862 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 968 transitions. Word has length 19 [2022-03-15 21:28:22,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:22,862 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 968 transitions. [2022-03-15 21:28:22,862 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 21:28:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 968 transitions. [2022-03-15 21:28:22,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:22,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:22,863 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:22,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:23,063 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 21:28:23,064 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:23,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2090718356, now seen corresponding path program 92 times [2022-03-15 21:28:23,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:23,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203535946] [2022-03-15 21:28:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:23,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:23,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:23,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203535946] [2022-03-15 21:28:23,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203535946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:23,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42684357] [2022-03-15 21:28:23,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:23,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:23,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:23,133 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 21:28:23,133 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 21:28:23,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:23,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:23,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:23,371 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 21:28:23,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:23,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42684357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:23,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:23,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2022-03-15 21:28:23,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1484843114] [2022-03-15 21:28:23,606 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:23,607 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:23,611 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:28:23,611 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:23,686 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [67683#(< i1 N1)] [2022-03-15 21:28:23,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:28:23,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:23,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:28:23,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:28:23,687 INFO L87 Difference]: Start difference. First operand 367 states and 968 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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 21:28:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:23,875 INFO L93 Difference]: Finished difference Result 497 states and 1170 transitions. [2022-03-15 21:28:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:28:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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 21:28:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:23,877 INFO L225 Difference]: With dead ends: 497 [2022-03-15 21:28:23,877 INFO L226 Difference]: Without dead ends: 495 [2022-03-15 21:28:23,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=1155, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:28:23,877 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:23,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-15 21:28:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 374. [2022-03-15 21:28:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.6327077747989276) internal successors, (982), 373 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 982 transitions. [2022-03-15 21:28:23,885 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 982 transitions. Word has length 19 [2022-03-15 21:28:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:23,885 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 982 transitions. [2022-03-15 21:28:23,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 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 21:28:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 982 transitions. [2022-03-15 21:28:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:23,886 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:23,886 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:23,908 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 21:28:24,099 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 21:28:24,099 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2029974507, now seen corresponding path program 93 times [2022-03-15 21:28:24,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:24,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081662412] [2022-03-15 21:28:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:24,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:24,196 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 21:28:24,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:24,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081662412] [2022-03-15 21:28:24,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081662412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:24,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265577008] [2022-03-15 21:28:24,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:24,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:24,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:24,197 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 21:28:24,204 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 21:28:24,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:28:24,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:24,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:24,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:24,483 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 21:28:24,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:24,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265577008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:24,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:24,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2022-03-15 21:28:24,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1951763678] [2022-03-15 21:28:24,701 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:24,703 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:24,706 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:28:24,706 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:24,818 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [69086#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 69084#(< i1 N1), 69085#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:24,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:28:24,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:24,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:28:24,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:28:24,819 INFO L87 Difference]: Start difference. First operand 374 states and 982 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 21:28:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:25,345 INFO L93 Difference]: Finished difference Result 540 states and 1257 transitions. [2022-03-15 21:28:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:28:25,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 21:28:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:25,347 INFO L225 Difference]: With dead ends: 540 [2022-03-15 21:28:25,347 INFO L226 Difference]: Without dead ends: 538 [2022-03-15 21:28:25,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=765, Invalid=2775, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:28:25,348 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:25,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-15 21:28:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 389. [2022-03-15 21:28:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.6391752577319587) internal successors, (1024), 388 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1024 transitions. [2022-03-15 21:28:25,355 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1024 transitions. Word has length 19 [2022-03-15 21:28:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:25,355 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1024 transitions. [2022-03-15 21:28:25,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 21:28:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1024 transitions. [2022-03-15 21:28:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:25,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:25,357 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:25,379 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 21:28:25,571 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 21:28:25,571 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1142470826, now seen corresponding path program 94 times [2022-03-15 21:28:25,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:25,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729259664] [2022-03-15 21:28:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:25,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:25,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:25,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729259664] [2022-03-15 21:28:25,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729259664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:25,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600819795] [2022-03-15 21:28:25,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:25,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:25,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:25,669 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 21:28:25,695 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 21:28:25,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:25,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:25,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:25,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:25,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:26,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600819795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:26,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:26,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 33 [2022-03-15 21:28:26,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [580050506] [2022-03-15 21:28:26,173 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:26,174 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:26,178 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:28:26,178 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:26,253 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [70544#(< i1 N1), 70595#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:26,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:28:26,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:26,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:28:26,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:28:26,253 INFO L87 Difference]: Start difference. First operand 389 states and 1024 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 21:28:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:26,443 INFO L93 Difference]: Finished difference Result 531 states and 1245 transitions. [2022-03-15 21:28:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:28:26,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 21:28:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:26,445 INFO L225 Difference]: With dead ends: 531 [2022-03-15 21:28:26,445 INFO L226 Difference]: Without dead ends: 531 [2022-03-15 21:28:26,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=1411, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:28:26,445 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:26,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-03-15 21:28:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 391. [2022-03-15 21:28:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.641025641025641) internal successors, (1030), 390 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1030 transitions. [2022-03-15 21:28:26,452 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1030 transitions. Word has length 19 [2022-03-15 21:28:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:26,453 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1030 transitions. [2022-03-15 21:28:26,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 21:28:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1030 transitions. [2022-03-15 21:28:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:26,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:26,453 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:26,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 21:28:26,654 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 21:28:26,654 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash 168035598, now seen corresponding path program 95 times [2022-03-15 21:28:26,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:26,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381392069] [2022-03-15 21:28:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:26,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:26,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:26,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381392069] [2022-03-15 21:28:26,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381392069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:26,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425047097] [2022-03-15 21:28:26,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:26,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:26,725 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 21:28:26,725 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 21:28:26,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:28:26,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:26,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:26,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:26,948 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 21:28:26,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:27,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425047097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:27,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:27,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2022-03-15 21:28:27,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319325654] [2022-03-15 21:28:27,162 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:27,163 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:27,166 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:28:27,167 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:27,217 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [72065#(< i1 N1)] [2022-03-15 21:28:27,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:28:27,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:28:27,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:28:27,218 INFO L87 Difference]: Start difference. First operand 391 states and 1030 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 21:28:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:27,401 INFO L93 Difference]: Finished difference Result 559 states and 1306 transitions. [2022-03-15 21:28:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:28:27,401 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 19 [2022-03-15 21:28:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:27,402 INFO L225 Difference]: With dead ends: 559 [2022-03-15 21:28:27,402 INFO L226 Difference]: Without dead ends: 555 [2022-03-15 21:28:27,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:28:27,402 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:27,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:27,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-03-15 21:28:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 405. [2022-03-15 21:28:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.6386138613861387) internal successors, (1066), 404 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1066 transitions. [2022-03-15 21:28:27,410 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1066 transitions. Word has length 19 [2022-03-15 21:28:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:27,410 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1066 transitions. [2022-03-15 21:28:27,410 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 21:28:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1066 transitions. [2022-03-15 21:28:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:27,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:27,411 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:27,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:27,634 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 21:28:27,634 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:27,635 INFO L85 PathProgramCache]: Analyzing trace with hash 228779447, now seen corresponding path program 96 times [2022-03-15 21:28:27,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:27,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588898710] [2022-03-15 21:28:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:27,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:27,735 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 21:28:27,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:27,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588898710] [2022-03-15 21:28:27,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588898710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:27,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136367396] [2022-03-15 21:28:27,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:27,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:27,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:27,740 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 21:28:27,741 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 21:28:27,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:28:27,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:27,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:28,018 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 21:28:28,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:28,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136367396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:28,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:28,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2022-03-15 21:28:28,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1334117014] [2022-03-15 21:28:28,270 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:28,271 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:28,275 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:28:28,275 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:28,409 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [73596#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 73595#(or (< (+ i1 1) N1) (<= N1 i1)), 73597#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 73594#(< i1 N1)] [2022-03-15 21:28:28,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:28:28,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:28:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:28:28,410 INFO L87 Difference]: Start difference. First operand 405 states and 1066 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 21:28:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:29,003 INFO L93 Difference]: Finished difference Result 604 states and 1389 transitions. [2022-03-15 21:28:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:28:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 21:28:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:29,004 INFO L225 Difference]: With dead ends: 604 [2022-03-15 21:28:29,004 INFO L226 Difference]: Without dead ends: 599 [2022-03-15 21:28:29,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=834, Invalid=3072, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:28:29,005 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:29,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-03-15 21:28:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 418. [2022-03-15 21:28:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.642685851318945) internal successors, (1102), 417 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1102 transitions. [2022-03-15 21:28:29,017 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1102 transitions. Word has length 19 [2022-03-15 21:28:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:29,017 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1102 transitions. [2022-03-15 21:28:29,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 21:28:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1102 transitions. [2022-03-15 21:28:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:29,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:29,020 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:29,035 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 21:28:29,220 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 21:28:29,220 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:29,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:29,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1116283128, now seen corresponding path program 97 times [2022-03-15 21:28:29,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:29,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097719952] [2022-03-15 21:28:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:29,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:29,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:29,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097719952] [2022-03-15 21:28:29,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097719952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:29,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625819885] [2022-03-15 21:28:29,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:29,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:29,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:29,298 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 21:28:29,299 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 21:28:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:29,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:29,529 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 21:28:29,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:29,750 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 21:28:29,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625819885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:29,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:29,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 33 [2022-03-15 21:28:29,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [477100167] [2022-03-15 21:28:29,750 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:29,752 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:29,755 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 21:28:29,755 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:29,811 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [75181#(< i1 N1), 75232#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:29,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:28:29,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:29,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:28:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:28:29,812 INFO L87 Difference]: Start difference. First operand 418 states and 1102 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 21:28:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:29,982 INFO L93 Difference]: Finished difference Result 535 states and 1268 transitions. [2022-03-15 21:28:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:28:29,982 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 21:28:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:29,983 INFO L225 Difference]: With dead ends: 535 [2022-03-15 21:28:29,983 INFO L226 Difference]: Without dead ends: 535 [2022-03-15 21:28:29,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:28:29,984 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:29,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-03-15 21:28:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 407. [2022-03-15 21:28:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.6182266009852215) internal successors, (1063), 406 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1063 transitions. [2022-03-15 21:28:29,991 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1063 transitions. Word has length 19 [2022-03-15 21:28:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:29,991 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1063 transitions. [2022-03-15 21:28:29,991 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 21:28:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1063 transitions. [2022-03-15 21:28:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:29,992 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:29,992 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:30,010 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 21:28:30,203 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 21:28:30,203 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:30,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:30,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1971589782, now seen corresponding path program 98 times [2022-03-15 21:28:30,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:30,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398781663] [2022-03-15 21:28:30,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:30,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:30,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:30,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398781663] [2022-03-15 21:28:30,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398781663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:30,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071859504] [2022-03-15 21:28:30,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:30,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:30,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:30,293 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 21:28:30,294 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 21:28:30,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:30,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:30,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:30,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:30,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:30,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071859504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:30,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:30,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 34 [2022-03-15 21:28:30,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [877461136] [2022-03-15 21:28:30,744 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:30,745 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:30,749 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:28:30,749 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:30,844 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [76739#(or (< (+ i1 1) N1) (<= N1 i1)), 76688#(< i1 N1), 76740#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:28:30,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:28:30,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:30,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:28:30,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:28:30,845 INFO L87 Difference]: Start difference. First operand 407 states and 1063 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 21:28:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:31,094 INFO L93 Difference]: Finished difference Result 546 states and 1280 transitions. [2022-03-15 21:28:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:28:31,094 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 19 [2022-03-15 21:28:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:31,096 INFO L225 Difference]: With dead ends: 546 [2022-03-15 21:28:31,096 INFO L226 Difference]: Without dead ends: 546 [2022-03-15 21:28:31,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=471, Invalid=1785, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:28:31,096 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:31,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-03-15 21:28:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 413. [2022-03-15 21:28:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.6237864077669903) internal successors, (1081), 412 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1081 transitions. [2022-03-15 21:28:31,103 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1081 transitions. Word has length 19 [2022-03-15 21:28:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:31,103 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1081 transitions. [2022-03-15 21:28:31,103 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 21:28:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1081 transitions. [2022-03-15 21:28:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:31,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:31,104 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:31,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 21:28:31,325 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 21:28:31,325 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:31,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1469931436, now seen corresponding path program 99 times [2022-03-15 21:28:31,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:31,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198417217] [2022-03-15 21:28:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:31,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:31,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:31,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198417217] [2022-03-15 21:28:31,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198417217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:31,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779677745] [2022-03-15 21:28:31,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:31,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:31,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:31,418 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 21:28:31,419 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 21:28:31,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:28:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:31,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:31,693 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 21:28:31,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:31,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779677745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:31,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:31,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2022-03-15 21:28:31,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [599437939] [2022-03-15 21:28:31,943 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:31,945 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:31,948 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 21:28:31,948 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:31,997 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [78275#(< i1 N1)] [2022-03-15 21:28:31,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:28:31,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:31,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:28:31,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:28:31,998 INFO L87 Difference]: Start difference. First operand 413 states and 1081 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 21:28:32,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:32,210 INFO L93 Difference]: Finished difference Result 579 states and 1361 transitions. [2022-03-15 21:28:32,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:28:32,210 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 19 [2022-03-15 21:28:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:32,211 INFO L225 Difference]: With dead ends: 579 [2022-03-15 21:28:32,211 INFO L226 Difference]: Without dead ends: 575 [2022-03-15 21:28:32,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=495, Invalid=1397, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:28:32,212 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:32,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:32,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-03-15 21:28:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 428. [2022-03-15 21:28:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.6346604215456675) internal successors, (1125), 427 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:32,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1125 transitions. [2022-03-15 21:28:32,217 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1125 transitions. Word has length 19 [2022-03-15 21:28:32,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:32,217 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1125 transitions. [2022-03-15 21:28:32,217 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 21:28:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1125 transitions. [2022-03-15 21:28:32,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:32,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:32,218 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:32,233 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 21:28:32,418 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 21:28:32,418 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:32,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1530675285, now seen corresponding path program 100 times [2022-03-15 21:28:32,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:32,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665368661] [2022-03-15 21:28:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:32,511 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 21:28:32,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:32,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665368661] [2022-03-15 21:28:32,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665368661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:32,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43988415] [2022-03-15 21:28:32,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:32,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:32,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:32,513 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 21:28:32,513 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 21:28:32,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:32,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:32,751 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 21:28:32,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:32,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43988415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:32,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:32,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2022-03-15 21:28:32,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1368016671] [2022-03-15 21:28:32,966 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:32,967 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:32,970 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:28:32,970 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:33,103 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [79877#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 79875#(or (< (+ i1 1) N1) (<= N1 i1)), 79874#(< i1 N1), 79876#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 79878#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1))] [2022-03-15 21:28:33,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:28:33,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:28:33,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:28:33,104 INFO L87 Difference]: Start difference. First operand 428 states and 1125 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 21:28:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:33,754 INFO L93 Difference]: Finished difference Result 632 states and 1446 transitions. [2022-03-15 21:28:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:28:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 21:28:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:33,755 INFO L225 Difference]: With dead ends: 632 [2022-03-15 21:28:33,755 INFO L226 Difference]: Without dead ends: 625 [2022-03-15 21:28:33,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=875, Invalid=3285, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:28:33,756 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:33,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-03-15 21:28:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 440. [2022-03-15 21:28:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.630979498861048) internal successors, (1155), 439 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1155 transitions. [2022-03-15 21:28:33,761 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1155 transitions. Word has length 19 [2022-03-15 21:28:33,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:33,762 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1155 transitions. [2022-03-15 21:28:33,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 21:28:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1155 transitions. [2022-03-15 21:28:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:33,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:33,762 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:33,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-15 21:28:33,963 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 21:28:33,963 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:33,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:33,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1876788330, now seen corresponding path program 101 times [2022-03-15 21:28:33,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:33,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380130058] [2022-03-15 21:28:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:34,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:34,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380130058] [2022-03-15 21:28:34,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380130058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:34,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940664903] [2022-03-15 21:28:34,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:34,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:34,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:34,042 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 21:28:34,042 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 21:28:34,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:28:34,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:34,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:34,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:34,263 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 21:28:34,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:34,527 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 21:28:34,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940664903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:34,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:34,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 33 [2022-03-15 21:28:34,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1153463173] [2022-03-15 21:28:34,527 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:34,528 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:34,531 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 21:28:34,531 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:34,577 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [81536#(< i1 N1), 81587#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:34,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:28:34,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:28:34,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:28:34,578 INFO L87 Difference]: Start difference. First operand 440 states and 1155 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 21:28:34,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:34,770 INFO L93 Difference]: Finished difference Result 591 states and 1393 transitions. [2022-03-15 21:28:34,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:28:34,770 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 19 [2022-03-15 21:28:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:34,771 INFO L225 Difference]: With dead ends: 591 [2022-03-15 21:28:34,771 INFO L226 Difference]: Without dead ends: 589 [2022-03-15 21:28:34,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1498, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:28:34,772 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:34,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:34,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-03-15 21:28:34,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 440. [2022-03-15 21:28:34,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.6264236902050113) internal successors, (1153), 439 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:34,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1153 transitions. [2022-03-15 21:28:34,777 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1153 transitions. Word has length 19 [2022-03-15 21:28:34,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:34,777 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1153 transitions. [2022-03-15 21:28:34,778 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 21:28:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1153 transitions. [2022-03-15 21:28:34,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:34,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:34,778 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:34,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:34,980 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 21:28:34,980 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1021481676, now seen corresponding path program 102 times [2022-03-15 21:28:34,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:34,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515904168] [2022-03-15 21:28:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:34,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:35,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:35,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515904168] [2022-03-15 21:28:35,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515904168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:35,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126250598] [2022-03-15 21:28:35,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:35,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:35,088 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 21:28:35,089 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 21:28:35,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:28:35,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:35,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:35,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:35,336 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 21:28:35,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:35,547 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 21:28:35,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126250598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:35,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:35,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 34 [2022-03-15 21:28:35,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1139526883] [2022-03-15 21:28:35,548 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:35,549 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:35,551 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 21:28:35,551 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:35,626 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [83220#(or (< (+ i1 1) N1) (<= N1 i1)), 83221#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 83169#(< i1 N1)] [2022-03-15 21:28:35,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:28:35,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:28:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:28:35,626 INFO L87 Difference]: Start difference. First operand 440 states and 1153 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:35,831 INFO L93 Difference]: Finished difference Result 533 states and 1274 transitions. [2022-03-15 21:28:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:28:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:28:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:35,833 INFO L225 Difference]: With dead ends: 533 [2022-03-15 21:28:35,833 INFO L226 Difference]: Without dead ends: 533 [2022-03-15 21:28:35,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:28:35,833 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:35,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-15 21:28:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 421. [2022-03-15 21:28:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.6142857142857143) internal successors, (1098), 420 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1098 transitions. [2022-03-15 21:28:35,838 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1098 transitions. Word has length 19 [2022-03-15 21:28:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:35,838 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1098 transitions. [2022-03-15 21:28:35,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1098 transitions. [2022-03-15 21:28:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:35,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:35,839 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:35,863 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 21:28:36,056 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 21:28:36,056 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:36,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:36,056 INFO L85 PathProgramCache]: Analyzing trace with hash -276779178, now seen corresponding path program 103 times [2022-03-15 21:28:36,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:36,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400943839] [2022-03-15 21:28:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:36,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:36,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:36,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400943839] [2022-03-15 21:28:36,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400943839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:36,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302890819] [2022-03-15 21:28:36,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:36,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:36,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:36,164 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 21:28:36,191 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 21:28:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:36,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:36,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:36,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302890819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:36,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:36,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2022-03-15 21:28:36,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [125977607] [2022-03-15 21:28:36,628 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:36,629 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:36,640 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:28:36,641 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:36,762 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [84761#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 84759#(or (< (+ i1 1) N1) (<= N1 i1)), 84708#(< i1 N1), 84760#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:28:36,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:28:36,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:36,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:28:36,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:28:36,764 INFO L87 Difference]: Start difference. First operand 421 states and 1098 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:37,056 INFO L93 Difference]: Finished difference Result 534 states and 1265 transitions. [2022-03-15 21:28:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:28:37,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:28:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:37,058 INFO L225 Difference]: With dead ends: 534 [2022-03-15 21:28:37,058 INFO L226 Difference]: Without dead ends: 534 [2022-03-15 21:28:37,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=551, Invalid=2101, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:28:37,058 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:37,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-03-15 21:28:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 429. [2022-03-15 21:28:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.621495327102804) internal successors, (1122), 428 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1122 transitions. [2022-03-15 21:28:37,063 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1122 transitions. Word has length 19 [2022-03-15 21:28:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:37,063 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1122 transitions. [2022-03-15 21:28:37,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1122 transitions. [2022-03-15 21:28:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:37,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:37,064 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:37,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-15 21:28:37,264 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 21:28:37,264 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:37,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1120970546, now seen corresponding path program 104 times [2022-03-15 21:28:37,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:37,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283679029] [2022-03-15 21:28:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:37,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:37,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:37,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283679029] [2022-03-15 21:28:37,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283679029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:37,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537752101] [2022-03-15 21:28:37,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:37,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:37,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:37,351 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 21:28:37,378 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 21:28:37,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:37,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:37,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:37,617 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 21:28:37,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:37,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537752101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:37,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:37,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2022-03-15 21:28:37,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1128430181] [2022-03-15 21:28:37,860 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:37,861 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:37,864 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 21:28:37,865 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:37,901 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [86320#(< i1 N1)] [2022-03-15 21:28:37,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:28:37,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:28:37,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:28:37,902 INFO L87 Difference]: Start difference. First operand 429 states and 1122 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 21:28:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:38,168 INFO L93 Difference]: Finished difference Result 568 states and 1356 transitions. [2022-03-15 21:28:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:28:38,168 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 19 [2022-03-15 21:28:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:38,169 INFO L225 Difference]: With dead ends: 568 [2022-03-15 21:28:38,169 INFO L226 Difference]: Without dead ends: 564 [2022-03-15 21:28:38,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:28:38,170 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:38,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-15 21:28:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 428. [2022-03-15 21:28:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.6088992974238874) internal successors, (1114), 427 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1114 transitions. [2022-03-15 21:28:38,175 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1114 transitions. Word has length 19 [2022-03-15 21:28:38,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:38,175 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1114 transitions. [2022-03-15 21:28:38,175 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 21:28:38,175 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1114 transitions. [2022-03-15 21:28:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:38,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:38,176 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:38,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 21:28:38,376 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 21:28:38,376 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1060226697, now seen corresponding path program 105 times [2022-03-15 21:28:38,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:38,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856207750] [2022-03-15 21:28:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:38,459 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 21:28:38,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:38,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856207750] [2022-03-15 21:28:38,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856207750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:38,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328611187] [2022-03-15 21:28:38,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:38,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:38,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:38,460 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 21:28:38,461 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 21:28:38,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:28:38,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:38,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:38,691 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 21:28:38,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:38,914 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 21:28:38,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328611187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:38,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:38,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2022-03-15 21:28:38,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [186397326] [2022-03-15 21:28:38,914 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:38,915 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:38,918 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:28:38,918 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:39,066 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [87912#(< i1 N1), 87914#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 87913#(or (< (+ i1 1) N1) (<= N1 i1)), 87916#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 87915#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 87917#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1))] [2022-03-15 21:28:39,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:28:39,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:28:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:28:39,067 INFO L87 Difference]: Start difference. First operand 428 states and 1114 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 21:28:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:39,766 INFO L93 Difference]: Finished difference Result 623 states and 1406 transitions. [2022-03-15 21:28:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:28:39,767 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 19 [2022-03-15 21:28:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:39,768 INFO L225 Difference]: With dead ends: 623 [2022-03-15 21:28:39,768 INFO L226 Difference]: Without dead ends: 614 [2022-03-15 21:28:39,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=881, Invalid=3409, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:28:39,768 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 127 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:39,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 0 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-03-15 21:28:39,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 437. [2022-03-15 21:28:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.5940366972477062) internal successors, (1131), 436 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1131 transitions. [2022-03-15 21:28:39,774 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1131 transitions. Word has length 19 [2022-03-15 21:28:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:39,774 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1131 transitions. [2022-03-15 21:28:39,774 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 21:28:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1131 transitions. [2022-03-15 21:28:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:39,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:39,774 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:39,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-15 21:28:39,975 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 21:28:39,975 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:39,975 INFO L85 PathProgramCache]: Analyzing trace with hash -172723016, now seen corresponding path program 106 times [2022-03-15 21:28:39,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:39,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592230901] [2022-03-15 21:28:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:40,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:40,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592230901] [2022-03-15 21:28:40,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592230901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:40,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509419034] [2022-03-15 21:28:40,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:40,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:40,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:40,054 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 21:28:40,055 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 21:28:40,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:40,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:40,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:40,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:40,274 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 21:28:40,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:40,495 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 21:28:40,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509419034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:40,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:40,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 33 [2022-03-15 21:28:40,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [211414650] [2022-03-15 21:28:40,495 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:40,497 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:40,499 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 21:28:40,500 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:40,536 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [89611#(or (< (+ i1 1) N1) (<= N1 i1)), 89560#(< i1 N1)] [2022-03-15 21:28:40,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:28:40,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:40,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:28:40,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:28:40,536 INFO L87 Difference]: Start difference. First operand 437 states and 1131 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 21:28:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:40,725 INFO L93 Difference]: Finished difference Result 576 states and 1346 transitions. [2022-03-15 21:28:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:28:40,725 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 19 [2022-03-15 21:28:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:40,727 INFO L225 Difference]: With dead ends: 576 [2022-03-15 21:28:40,727 INFO L226 Difference]: Without dead ends: 574 [2022-03-15 21:28:40,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=1565, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:28:40,727 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:40,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-03-15 21:28:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 439. [2022-03-15 21:28:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.593607305936073) internal successors, (1136), 438 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1136 transitions. [2022-03-15 21:28:40,735 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1136 transitions. Word has length 19 [2022-03-15 21:28:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:40,735 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1136 transitions. [2022-03-15 21:28:40,735 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 21:28:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1136 transitions. [2022-03-15 21:28:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:40,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:40,736 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:40,758 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 21:28:40,956 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 21:28:40,956 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash 682583638, now seen corresponding path program 107 times [2022-03-15 21:28:40,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:40,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22165287] [2022-03-15 21:28:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:40,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:41,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:41,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22165287] [2022-03-15 21:28:41,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22165287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:41,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824057509] [2022-03-15 21:28:41,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:41,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:41,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:41,048 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 21:28:41,048 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 21:28:41,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:28:41,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:41,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:41,272 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 21:28:41,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:41,482 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 21:28:41,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824057509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:41,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:41,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 34 [2022-03-15 21:28:41,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [385012797] [2022-03-15 21:28:41,483 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:41,484 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:41,487 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 21:28:41,487 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:41,550 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [91230#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 91178#(< i1 N1), 91229#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:41,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:28:41,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:41,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:28:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:28:41,551 INFO L87 Difference]: Start difference. First operand 439 states and 1136 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:41,788 INFO L93 Difference]: Finished difference Result 560 states and 1318 transitions. [2022-03-15 21:28:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:28:41,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:28:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:41,789 INFO L225 Difference]: With dead ends: 560 [2022-03-15 21:28:41,789 INFO L226 Difference]: Without dead ends: 557 [2022-03-15 21:28:41,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1887, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:28:41,790 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:41,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-03-15 21:28:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 436. [2022-03-15 21:28:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.5954022988505745) internal successors, (1129), 435 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1129 transitions. [2022-03-15 21:28:41,795 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1129 transitions. Word has length 19 [2022-03-15 21:28:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:41,795 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1129 transitions. [2022-03-15 21:28:41,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:41,796 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1129 transitions. [2022-03-15 21:28:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:41,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:41,796 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:41,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-15 21:28:41,996 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 21:28:41,997 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1427286136, now seen corresponding path program 108 times [2022-03-15 21:28:41,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:41,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160015037] [2022-03-15 21:28:41,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:41,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:42,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:42,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160015037] [2022-03-15 21:28:42,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160015037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:42,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425178450] [2022-03-15 21:28:42,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:42,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:42,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:42,107 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 21:28:42,108 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 21:28:42,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:28:42,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:42,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:42,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:42,334 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 21:28:42,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:42,578 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 21:28:42,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425178450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:42,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:42,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2022-03-15 21:28:42,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1300080691] [2022-03-15 21:28:42,578 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:42,579 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:42,582 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 21:28:42,582 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:42,673 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [92780#(< i1 N1), 92832#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 92833#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 92831#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:42,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:28:42,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:42,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:28:42,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:28:42,673 INFO L87 Difference]: Start difference. First operand 436 states and 1129 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:42,894 INFO L93 Difference]: Finished difference Result 503 states and 1210 transitions. [2022-03-15 21:28:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:28:42,894 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:28:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:42,895 INFO L225 Difference]: With dead ends: 503 [2022-03-15 21:28:42,895 INFO L226 Difference]: Without dead ends: 503 [2022-03-15 21:28:42,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=1899, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:28:42,896 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:42,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-03-15 21:28:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 416. [2022-03-15 21:28:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.612048192771084) internal successors, (1084), 415 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1084 transitions. [2022-03-15 21:28:42,900 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1084 transitions. Word has length 19 [2022-03-15 21:28:42,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:42,901 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1084 transitions. [2022-03-15 21:28:42,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1084 transitions. [2022-03-15 21:28:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:42,901 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:42,901 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:42,917 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 21:28:43,101 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 21:28:43,102 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:43,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1256740202, now seen corresponding path program 109 times [2022-03-15 21:28:43,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:43,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474853237] [2022-03-15 21:28:43,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:43,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:43,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:43,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474853237] [2022-03-15 21:28:43,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474853237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:43,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119654495] [2022-03-15 21:28:43,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:43,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:43,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:43,225 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 21:28:43,227 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 21:28:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:43,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:43,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:43,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:43,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119654495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:43,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:43,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2022-03-15 21:28:43,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1101934925] [2022-03-15 21:28:43,777 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:43,778 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:43,782 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:28:43,782 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:43,933 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [94283#(< i1 N1), 94336#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 94337#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 94335#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 94334#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:43,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:28:43,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:43,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:28:43,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:28:43,934 INFO L87 Difference]: Start difference. First operand 416 states and 1084 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 21:28:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:44,312 INFO L93 Difference]: Finished difference Result 498 states and 1193 transitions. [2022-03-15 21:28:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:28:44,312 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 21:28:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:44,313 INFO L225 Difference]: With dead ends: 498 [2022-03-15 21:28:44,313 INFO L226 Difference]: Without dead ends: 498 [2022-03-15 21:28:44,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=647, Invalid=2433, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:28:44,314 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:44,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-03-15 21:28:44,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 406. [2022-03-15 21:28:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.5975308641975308) internal successors, (1052), 405 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1052 transitions. [2022-03-15 21:28:44,318 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1052 transitions. Word has length 19 [2022-03-15 21:28:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:44,318 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1052 transitions. [2022-03-15 21:28:44,318 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 21:28:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1052 transitions. [2022-03-15 21:28:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:44,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:44,319 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:44,334 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 21:28:44,519 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 21:28:44,520 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:44,520 INFO L85 PathProgramCache]: Analyzing trace with hash 403291756, now seen corresponding path program 110 times [2022-03-15 21:28:44,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:44,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782651721] [2022-03-15 21:28:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:44,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:44,612 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 21:28:44,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:44,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782651721] [2022-03-15 21:28:44,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782651721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:44,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249638058] [2022-03-15 21:28:44,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:44,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:44,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:44,614 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 21:28:44,614 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 21:28:44,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:44,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:44,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:44,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:44,850 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 21:28:44,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:44,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249638058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:44,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:44,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-03-15 21:28:44,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2909776] [2022-03-15 21:28:44,978 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:44,979 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:44,982 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 43 transitions. [2022-03-15 21:28:44,982 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:45,137 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [95821#(or (< i1 N1) (<= N2 (+ 2 i2))), 95819#(or (<= N2 i2) (< i1 N1)), 95820#(or (<= N2 (+ i2 1)) (< i1 N1)), 95818#(< i1 N1), 95822#(or (<= N2 (+ 3 i2)) (< i1 N1))] [2022-03-15 21:28:45,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:28:45,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:28:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:28:45,137 INFO L87 Difference]: Start difference. First operand 406 states and 1052 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 21:28:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:45,357 INFO L93 Difference]: Finished difference Result 505 states and 1194 transitions. [2022-03-15 21:28:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:28:45,357 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 19 [2022-03-15 21:28:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:45,358 INFO L225 Difference]: With dead ends: 505 [2022-03-15 21:28:45,358 INFO L226 Difference]: Without dead ends: 495 [2022-03-15 21:28:45,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1662, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:28:45,359 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:45,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-15 21:28:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 366. [2022-03-15 21:28:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.6191780821917807) internal successors, (956), 365 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 956 transitions. [2022-03-15 21:28:45,367 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 956 transitions. Word has length 19 [2022-03-15 21:28:45,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:45,367 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 956 transitions. [2022-03-15 21:28:45,367 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 21:28:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 956 transitions. [2022-03-15 21:28:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:45,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:45,368 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:45,390 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 21:28:45,587 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 21:28:45,587 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:45,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:45,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2055611029, now seen corresponding path program 111 times [2022-03-15 21:28:45,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:45,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665751486] [2022-03-15 21:28:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:45,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:45,688 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 21:28:45,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:45,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665751486] [2022-03-15 21:28:45,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665751486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:45,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654358217] [2022-03-15 21:28:45,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:45,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:45,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:45,690 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 21:28:45,691 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 21:28:45,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:28:45,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:45,916 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 21:28:45,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:46,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654358217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:46,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:46,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 21:28:46,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1508776329] [2022-03-15 21:28:46,052 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:46,053 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:46,056 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 39 transitions. [2022-03-15 21:28:46,056 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:46,226 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [97226#(or (< i1 N1) (<= (+ 3 i2) N2)), 97227#(or (<= (+ i2 4) N2) (< i1 N1)), 97224#(or (< i2 N2) (< i1 N1)), 97225#(or (< i1 N1) (<= (+ 2 i2) N2)), 97223#(< i1 N1)] [2022-03-15 21:28:46,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:28:46,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:28:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:28:46,226 INFO L87 Difference]: Start difference. First operand 366 states and 956 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:46,405 INFO L93 Difference]: Finished difference Result 482 states and 1123 transitions. [2022-03-15 21:28:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:28:46,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:28:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:46,406 INFO L225 Difference]: With dead ends: 482 [2022-03-15 21:28:46,406 INFO L226 Difference]: Without dead ends: 466 [2022-03-15 21:28:46,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=464, Invalid=1698, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:28:46,407 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:46,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-15 21:28:46,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 362. [2022-03-15 21:28:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.5844875346260388) internal successors, (933), 361 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 933 transitions. [2022-03-15 21:28:46,413 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 933 transitions. Word has length 19 [2022-03-15 21:28:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:46,413 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 933 transitions. [2022-03-15 21:28:46,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 933 transitions. [2022-03-15 21:28:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:46,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:46,414 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:46,436 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 21:28:46,636 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 21:28:46,636 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:46,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash -731804458, now seen corresponding path program 112 times [2022-03-15 21:28:46,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:46,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178021202] [2022-03-15 21:28:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:46,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:46,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:46,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178021202] [2022-03-15 21:28:46,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178021202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:46,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628389381] [2022-03-15 21:28:46,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:46,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:46,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:46,713 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 21:28:46,713 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 21:28:46,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:46,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:46,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:46,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:46,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:47,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628389381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:47,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:47,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2022-03-15 21:28:47,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [609915977] [2022-03-15 21:28:47,090 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:47,091 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:47,094 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 39 transitions. [2022-03-15 21:28:47,094 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:47,223 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [98592#(< i1 N1), 98595#(or (< i1 N1) (<= N2 (+ 2 i2))), 98593#(or (<= N2 i2) (< i1 N1)), 98594#(or (<= N2 (+ i2 1)) (< i1 N1))] [2022-03-15 21:28:47,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:28:47,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:28:47,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:28:47,224 INFO L87 Difference]: Start difference. First operand 362 states and 933 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 21:28:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:47,498 INFO L93 Difference]: Finished difference Result 456 states and 1074 transitions. [2022-03-15 21:28:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:28:47,498 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 19 [2022-03-15 21:28:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:47,499 INFO L225 Difference]: With dead ends: 456 [2022-03-15 21:28:47,499 INFO L226 Difference]: Without dead ends: 448 [2022-03-15 21:28:47,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=598, Invalid=1658, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:28:47,500 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:47,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-03-15 21:28:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 330. [2022-03-15 21:28:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.595744680851064) internal successors, (854), 329 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 854 transitions. [2022-03-15 21:28:47,505 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 854 transitions. Word has length 19 [2022-03-15 21:28:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:47,505 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 854 transitions. [2022-03-15 21:28:47,505 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 21:28:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 854 transitions. [2022-03-15 21:28:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:47,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:47,506 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:47,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-15 21:28:47,706 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 21:28:47,707 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:47,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:47,707 INFO L85 PathProgramCache]: Analyzing trace with hash 706969485, now seen corresponding path program 113 times [2022-03-15 21:28:47,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:47,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579885916] [2022-03-15 21:28:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:47,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:47,798 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 21:28:47,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:47,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579885916] [2022-03-15 21:28:47,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579885916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:47,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920146131] [2022-03-15 21:28:47,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:47,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:47,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:47,799 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 21:28:47,800 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 21:28:47,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:28:47,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:47,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:48,020 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 21:28:48,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:48,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920146131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:48,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:48,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2022-03-15 21:28:48,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1485543171] [2022-03-15 21:28:48,178 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:48,179 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:48,183 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:28:48,183 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:48,337 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [99879#(or (< i1 N1) (<= (+ 2 i2) N2)), 99878#(or (< i2 N2) (< i1 N1)), 99880#(or (< i1 N1) (<= (+ 3 i2) N2)), 99877#(< i1 N1)] [2022-03-15 21:28:48,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:28:48,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:48,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:28:48,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:28:48,338 INFO L87 Difference]: Start difference. First operand 330 states and 854 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 21:28:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:48,537 INFO L93 Difference]: Finished difference Result 469 states and 1059 transitions. [2022-03-15 21:28:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:28:48,538 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 19 [2022-03-15 21:28:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:48,539 INFO L225 Difference]: With dead ends: 469 [2022-03-15 21:28:48,539 INFO L226 Difference]: Without dead ends: 459 [2022-03-15 21:28:48,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=1484, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:28:48,540 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:48,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:48,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-03-15 21:28:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 328. [2022-03-15 21:28:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.5688073394495414) internal successors, (840), 327 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 840 transitions. [2022-03-15 21:28:48,545 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 840 transitions. Word has length 19 [2022-03-15 21:28:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:48,545 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 840 transitions. [2022-03-15 21:28:48,545 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 21:28:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 840 transitions. [2022-03-15 21:28:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:48,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:48,546 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:48,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:48,759 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 21:28:48,759 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:48,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash 201410860, now seen corresponding path program 114 times [2022-03-15 21:28:48,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:48,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098464481] [2022-03-15 21:28:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:48,847 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 21:28:48,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:48,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098464481] [2022-03-15 21:28:48,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098464481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:48,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570015815] [2022-03-15 21:28:48,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:48,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:48,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:48,849 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 21:28:48,874 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 21:28:48,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:28:48,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:49,119 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 21:28:49,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:49,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570015815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:49,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:49,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-15 21:28:49,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1723471176] [2022-03-15 21:28:49,299 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:49,300 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:49,306 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:28:49,307 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:49,416 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [101162#(or (<= N2 (+ i2 1)) (< i1 N1)), 101161#(or (<= N2 i2) (< i1 N1)), 101160#(< i1 N1)] [2022-03-15 21:28:49,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:28:49,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:49,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:28:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:28:49,417 INFO L87 Difference]: Start difference. First operand 328 states and 840 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 21:28:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:49,637 INFO L93 Difference]: Finished difference Result 411 states and 964 transitions. [2022-03-15 21:28:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:28:49,638 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 21:28:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:49,638 INFO L225 Difference]: With dead ends: 411 [2022-03-15 21:28:49,638 INFO L226 Difference]: Without dead ends: 405 [2022-03-15 21:28:49,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:28:49,639 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:49,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-03-15 21:28:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 318. [2022-03-15 21:28:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.586750788643533) internal successors, (820), 317 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 820 transitions. [2022-03-15 21:28:49,648 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 820 transitions. Word has length 19 [2022-03-15 21:28:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:49,648 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 820 transitions. [2022-03-15 21:28:49,648 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 21:28:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 820 transitions. [2022-03-15 21:28:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:49,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:49,648 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:49,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:49,863 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 21:28:49,863 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1553292395, now seen corresponding path program 115 times [2022-03-15 21:28:49,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:49,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677849949] [2022-03-15 21:28:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:49,948 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 21:28:49,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:49,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677849949] [2022-03-15 21:28:49,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677849949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:49,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107135895] [2022-03-15 21:28:49,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:49,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:49,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:49,949 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 21:28:49,949 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 21:28:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:49,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:50,170 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 21:28:50,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:50,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107135895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:50,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:50,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-03-15 21:28:50,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1796378053] [2022-03-15 21:28:50,349 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:50,350 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:50,352 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 21:28:50,352 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:50,436 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [102378#(or (< i2 N2) (< i1 N1)), 102379#(or (< i1 N1) (<= (+ 2 i2) N2)), 102377#(< i1 N1)] [2022-03-15 21:28:50,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:28:50,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:50,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:28:50,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:28:50,437 INFO L87 Difference]: Start difference. First operand 318 states and 820 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 21:28:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:50,559 INFO L93 Difference]: Finished difference Result 477 states and 1061 transitions. [2022-03-15 21:28:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:28:50,559 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 19 [2022-03-15 21:28:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:50,560 INFO L225 Difference]: With dead ends: 477 [2022-03-15 21:28:50,560 INFO L226 Difference]: Without dead ends: 473 [2022-03-15 21:28:50,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1280, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:28:50,561 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:50,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-03-15 21:28:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 318. [2022-03-15 21:28:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.5709779179810726) internal successors, (815), 317 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 815 transitions. [2022-03-15 21:28:50,564 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 815 transitions. Word has length 19 [2022-03-15 21:28:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:50,565 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 815 transitions. [2022-03-15 21:28:50,565 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 21:28:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 815 transitions. [2022-03-15 21:28:50,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:50,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:50,565 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:50,587 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 21:28:50,778 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 21:28:50,778 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:50,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:50,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1846695402, now seen corresponding path program 116 times [2022-03-15 21:28:50,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:50,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127161626] [2022-03-15 21:28:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:50,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:50,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:50,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127161626] [2022-03-15 21:28:50,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127161626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:50,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786871548] [2022-03-15 21:28:50,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:50,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:50,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:50,849 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 21:28:50,850 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 21:28:50,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:50,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:50,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:51,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:51,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786871548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:51,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:51,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 31 [2022-03-15 21:28:51,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [325977546] [2022-03-15 21:28:51,236 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:51,237 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:51,240 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 21:28:51,240 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:51,292 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [103643#(< i1 N1), 103644#(or (<= N2 i2) (< i1 N1))] [2022-03-15 21:28:51,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:28:51,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:28:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:28:51,293 INFO L87 Difference]: Start difference. First operand 318 states and 815 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 21:28:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:51,503 INFO L93 Difference]: Finished difference Result 389 states and 919 transitions. [2022-03-15 21:28:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:28:51,503 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 21:28:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:51,505 INFO L225 Difference]: With dead ends: 389 [2022-03-15 21:28:51,505 INFO L226 Difference]: Without dead ends: 385 [2022-03-15 21:28:51,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:28:51,505 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:51,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-03-15 21:28:51,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 314. [2022-03-15 21:28:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.5782747603833864) internal successors, (807), 313 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 807 transitions. [2022-03-15 21:28:51,511 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 807 transitions. Word has length 19 [2022-03-15 21:28:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:51,511 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 807 transitions. [2022-03-15 21:28:51,511 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 21:28:51,512 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 807 transitions. [2022-03-15 21:28:51,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:51,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:51,512 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:51,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:51,727 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 21:28:51,727 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash 36363917, now seen corresponding path program 117 times [2022-03-15 21:28:51,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:51,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238413880] [2022-03-15 21:28:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:51,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:51,809 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 21:28:51,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:51,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238413880] [2022-03-15 21:28:51,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238413880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:51,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819656681] [2022-03-15 21:28:51,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:51,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:51,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:51,810 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 21:28:51,811 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 21:28:51,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:28:51,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:51,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:51,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:52,036 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 21:28:52,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:52,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819656681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:52,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:52,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 32 [2022-03-15 21:28:52,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [137262691] [2022-03-15 21:28:52,244 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:52,245 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:52,247 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 21:28:52,247 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:52,299 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [104832#(or (< i2 N2) (< i1 N1)), 104831#(< i1 N1)] [2022-03-15 21:28:52,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:28:52,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:52,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:28:52,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:28:52,300 INFO L87 Difference]: Start difference. First operand 314 states and 807 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 21:28:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:52,392 INFO L93 Difference]: Finished difference Result 472 states and 1050 transitions. [2022-03-15 21:28:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:28:52,392 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 21:28:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:52,393 INFO L225 Difference]: With dead ends: 472 [2022-03-15 21:28:52,393 INFO L226 Difference]: Without dead ends: 472 [2022-03-15 21:28:52,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:28:52,393 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:52,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-15 21:28:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 318. [2022-03-15 21:28:52,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.583596214511041) internal successors, (819), 317 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 819 transitions. [2022-03-15 21:28:52,397 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 819 transitions. Word has length 19 [2022-03-15 21:28:52,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:52,397 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 819 transitions. [2022-03-15 21:28:52,397 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 21:28:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 819 transitions. [2022-03-15 21:28:52,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:52,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:52,398 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:52,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-15 21:28:52,598 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 21:28:52,598 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:52,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:52,599 INFO L85 PathProgramCache]: Analyzing trace with hash 165446636, now seen corresponding path program 118 times [2022-03-15 21:28:52,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:52,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532970386] [2022-03-15 21:28:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:52,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:52,667 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 21:28:52,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:52,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532970386] [2022-03-15 21:28:52,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532970386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:52,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650310646] [2022-03-15 21:28:52,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:52,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:52,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:52,668 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 21:28:52,669 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 21:28:52,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:52,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:52,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:52,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:52,891 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 21:28:52,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:53,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650310646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:53,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:53,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2022-03-15 21:28:53,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [53683513] [2022-03-15 21:28:53,084 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:53,085 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:53,088 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 21:28:53,088 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:53,116 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [106087#(< i1 N1)] [2022-03-15 21:28:53,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:28:53,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:53,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:28:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:28:53,117 INFO L87 Difference]: Start difference. First operand 318 states and 819 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 21:28:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:53,330 INFO L93 Difference]: Finished difference Result 381 states and 929 transitions. [2022-03-15 21:28:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:28:53,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 21:28:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:53,331 INFO L225 Difference]: With dead ends: 381 [2022-03-15 21:28:53,331 INFO L226 Difference]: Without dead ends: 379 [2022-03-15 21:28:53,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=592, Invalid=1664, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:28:53,332 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:53,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-03-15 21:28:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 327. [2022-03-15 21:28:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.607361963190184) internal successors, (850), 326 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 850 transitions. [2022-03-15 21:28:53,335 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 850 transitions. Word has length 19 [2022-03-15 21:28:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:53,336 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 850 transitions. [2022-03-15 21:28:53,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 21:28:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 850 transitions. [2022-03-15 21:28:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:53,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:53,336 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:53,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-15 21:28:53,536 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 21:28:53,537 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash 226190485, now seen corresponding path program 119 times [2022-03-15 21:28:53,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:53,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227005306] [2022-03-15 21:28:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:53,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:53,621 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 21:28:53,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:53,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227005306] [2022-03-15 21:28:53,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227005306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:53,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673382590] [2022-03-15 21:28:53,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:53,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:53,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:53,623 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 21:28:53,623 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 21:28:53,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:28:53,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:53,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:53,859 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 21:28:53,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:54,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673382590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:54,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:54,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2022-03-15 21:28:54,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [199196215] [2022-03-15 21:28:54,095 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:54,096 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:54,099 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:28:54,099 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:54,268 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [107299#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 107300#(or (<= N1 (+ 5 i1)) (< (+ 6 i1) N1)), 107298#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 107294#(< i1 N1), 107297#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 107296#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 107295#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:54,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:28:54,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:54,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:28:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1281, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:28:54,269 INFO L87 Difference]: Start difference. First operand 327 states and 850 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 21:28:55,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:55,212 INFO L93 Difference]: Finished difference Result 543 states and 1185 transitions. [2022-03-15 21:28:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:28:55,213 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 19 [2022-03-15 21:28:55,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:55,213 INFO L225 Difference]: With dead ends: 543 [2022-03-15 21:28:55,213 INFO L226 Difference]: Without dead ends: 543 [2022-03-15 21:28:55,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1182, Invalid=4368, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:28:55,214 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 139 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:55,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 0 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-03-15 21:28:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 347. [2022-03-15 21:28:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.5895953757225434) internal successors, (896), 346 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 896 transitions. [2022-03-15 21:28:55,218 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 896 transitions. Word has length 19 [2022-03-15 21:28:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:55,219 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 896 transitions. [2022-03-15 21:28:55,219 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 21:28:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 896 transitions. [2022-03-15 21:28:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:55,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:55,219 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:55,235 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 21:28:55,419 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 21:28:55,420 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:55,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:55,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1113694166, now seen corresponding path program 120 times [2022-03-15 21:28:55,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:55,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503926770] [2022-03-15 21:28:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:55,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:55,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:55,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503926770] [2022-03-15 21:28:55,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503926770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:55,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634591178] [2022-03-15 21:28:55,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:55,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:55,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:55,516 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 21:28:55,527 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 21:28:55,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:28:55,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:55,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:55,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:55,752 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 21:28:55,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:55,963 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 21:28:55,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634591178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:55,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:55,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 33 [2022-03-15 21:28:55,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [942876651] [2022-03-15 21:28:55,963 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:55,964 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:55,966 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 25 transitions. [2022-03-15 21:28:55,966 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:55,996 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [108699#(< i1 N1), 108750#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:55,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:28:55,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:28:55,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:28:55,996 INFO L87 Difference]: Start difference. First operand 347 states and 896 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 21:28:56,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:56,180 INFO L93 Difference]: Finished difference Result 433 states and 1023 transitions. [2022-03-15 21:28:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:28:56,180 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 19 [2022-03-15 21:28:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:56,181 INFO L225 Difference]: With dead ends: 433 [2022-03-15 21:28:56,181 INFO L226 Difference]: Without dead ends: 433 [2022-03-15 21:28:56,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=1560, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:28:56,181 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:56,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-03-15 21:28:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 347. [2022-03-15 21:28:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.5895953757225434) internal successors, (896), 346 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 896 transitions. [2022-03-15 21:28:56,185 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 896 transitions. Word has length 19 [2022-03-15 21:28:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:56,185 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 896 transitions. [2022-03-15 21:28:56,185 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 21:28:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 896 transitions. [2022-03-15 21:28:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:56,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:56,186 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:56,201 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 21:28:56,386 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 21:28:56,386 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:56,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1969000820, now seen corresponding path program 121 times [2022-03-15 21:28:56,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:56,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38733418] [2022-03-15 21:28:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:56,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:56,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:56,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38733418] [2022-03-15 21:28:56,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38733418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:56,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456375725] [2022-03-15 21:28:56,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:56,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:56,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:56,476 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 21:28:56,477 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 21:28:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:56,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:56,705 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 21:28:56,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:56,936 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 21:28:56,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456375725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:56,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:56,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 34 [2022-03-15 21:28:56,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1207099923] [2022-03-15 21:28:56,936 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:56,937 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:56,939 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 21:28:56,940 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:56,997 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [110041#(or (< (+ i1 1) N1) (<= N1 i1)), 109990#(< i1 N1), 110042#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:28:56,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:28:56,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:56,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:28:56,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:28:56,998 INFO L87 Difference]: Start difference. First operand 347 states and 896 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:57,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:57,213 INFO L93 Difference]: Finished difference Result 438 states and 1029 transitions. [2022-03-15 21:28:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:28:57,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:28:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:57,214 INFO L225 Difference]: With dead ends: 438 [2022-03-15 21:28:57,214 INFO L226 Difference]: Without dead ends: 438 [2022-03-15 21:28:57,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=460, Invalid=1892, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:28:57,214 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:57,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:57,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-15 21:28:57,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 347. [2022-03-15 21:28:57,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.5895953757225434) internal successors, (896), 346 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 896 transitions. [2022-03-15 21:28:57,219 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 896 transitions. Word has length 19 [2022-03-15 21:28:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:57,219 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 896 transitions. [2022-03-15 21:28:57,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 896 transitions. [2022-03-15 21:28:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:57,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:57,220 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:57,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:57,420 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 21:28:57,420 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:57,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:57,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1581263978, now seen corresponding path program 122 times [2022-03-15 21:28:57,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:57,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505899938] [2022-03-15 21:28:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:57,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:57,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:57,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505899938] [2022-03-15 21:28:57,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505899938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:57,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626457195] [2022-03-15 21:28:57,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:57,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:57,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:57,522 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 21:28:57,523 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 21:28:57,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:57,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:57,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:57,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:57,755 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 21:28:57,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:57,966 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 21:28:57,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626457195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:57,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:57,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2022-03-15 21:28:57,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1158063737] [2022-03-15 21:28:57,966 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:57,967 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:57,969 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 21:28:57,969 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:58,055 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [111292#(< i1 N1), 111343#(or (< (+ i1 1) N1) (<= N1 i1)), 111345#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 111344#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:28:58,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:28:58,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:58,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:28:58,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:28:58,056 INFO L87 Difference]: Start difference. First operand 347 states and 896 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:58,284 INFO L93 Difference]: Finished difference Result 433 states and 1017 transitions. [2022-03-15 21:28:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:28:58,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:28:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:58,285 INFO L225 Difference]: With dead ends: 433 [2022-03-15 21:28:58,285 INFO L226 Difference]: Without dead ends: 433 [2022-03-15 21:28:58,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=452, Invalid=1998, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:28:58,286 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:58,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-03-15 21:28:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 347. [2022-03-15 21:28:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.5895953757225434) internal successors, (896), 346 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 896 transitions. [2022-03-15 21:28:58,290 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 896 transitions. Word has length 19 [2022-03-15 21:28:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:58,290 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 896 transitions. [2022-03-15 21:28:58,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 896 transitions. [2022-03-15 21:28:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:58,291 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:58,291 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:58,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-15 21:28:58,503 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 21:28:58,503 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash 29676980, now seen corresponding path program 123 times [2022-03-15 21:28:58,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:58,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297966311] [2022-03-15 21:28:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:58,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:58,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:58,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297966311] [2022-03-15 21:28:58,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297966311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:58,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944859568] [2022-03-15 21:28:58,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:58,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:58,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:58,609 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 21:28:58,610 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 21:28:58,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:28:58,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:58,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:58,833 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 21:28:58,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:59,046 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 21:28:59,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944859568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:59,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:59,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2022-03-15 21:28:59,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1351568988] [2022-03-15 21:28:59,046 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:59,047 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:59,050 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 21:28:59,050 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:59,166 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [112641#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 112643#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 112642#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 112589#(< i1 N1), 112640#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:28:59,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:28:59,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:59,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:28:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:28:59,167 INFO L87 Difference]: Start difference. First operand 347 states and 896 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 21:28:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:59,340 INFO L93 Difference]: Finished difference Result 390 states and 938 transitions. [2022-03-15 21:28:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:28:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 21:28:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:59,340 INFO L225 Difference]: With dead ends: 390 [2022-03-15 21:28:59,340 INFO L226 Difference]: Without dead ends: 390 [2022-03-15 21:28:59,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1862, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:28:59,341 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:59,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-15 21:28:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 327. [2022-03-15 21:28:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6196319018404908) internal successors, (854), 326 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 854 transitions. [2022-03-15 21:28:59,345 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 854 transitions. Word has length 19 [2022-03-15 21:28:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:59,345 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 854 transitions. [2022-03-15 21:28:59,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 21:28:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 854 transitions. [2022-03-15 21:28:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:28:59,346 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:59,346 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:59,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-15 21:28:59,548 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 21:28:59,549 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:59,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1570760874, now seen corresponding path program 124 times [2022-03-15 21:28:59,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:59,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580157405] [2022-03-15 21:28:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:59,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:59,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:59,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580157405] [2022-03-15 21:28:59,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580157405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:59,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144241476] [2022-03-15 21:28:59,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:59,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:59,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:59,670 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 21:28:59,671 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 21:28:59,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:59,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:59,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:28:59,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:59,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:00,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144241476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:00,112 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:00,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-03-15 21:29:00,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [827489794] [2022-03-15 21:29:00,112 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:00,113 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:00,117 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:29:00,117 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:00,262 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [113797#(< i1 N1), 113851#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 113852#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 113849#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 113848#(or (< (+ i1 1) N1) (<= N1 i1)), 113850#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:29:00,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:29:00,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:29:00,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:29:00,263 INFO L87 Difference]: Start difference. First operand 327 states and 854 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 21:29:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:00,533 INFO L93 Difference]: Finished difference Result 377 states and 917 transitions. [2022-03-15 21:29:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:29:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 21:29:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:00,534 INFO L225 Difference]: With dead ends: 377 [2022-03-15 21:29:00,534 INFO L226 Difference]: Without dead ends: 377 [2022-03-15 21:29:00,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=603, Invalid=2477, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:29:00,535 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:00,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-15 21:29:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 333. [2022-03-15 21:29:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.6265060240963853) internal successors, (872), 332 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 872 transitions. [2022-03-15 21:29:00,540 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 872 transitions. Word has length 19 [2022-03-15 21:29:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:00,540 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 872 transitions. [2022-03-15 21:29:00,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 21:29:00,540 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 872 transitions. [2022-03-15 21:29:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:29:00,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:00,541 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:00,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-15 21:29:00,743 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 21:29:00,743 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1736190206, now seen corresponding path program 125 times [2022-03-15 21:29:00,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:00,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601514610] [2022-03-15 21:29:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:00,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:00,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:00,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601514610] [2022-03-15 21:29:00,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601514610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:00,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739602388] [2022-03-15 21:29:00,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:00,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:00,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:00,790 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 21:29:00,793 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 21:29:00,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:29:00,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:00,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 21:29:00,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:00,968 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-03-15 21:29:00,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 121 [2022-03-15 21:29:15,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:15,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-03-15 21:29:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:15,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:15,569 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-03-15 21:29:15,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-03-15 21:29:15,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:15,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-03-15 21:29:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:15,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739602388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:15,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:15,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 23 [2022-03-15 21:29:15,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [465570293] [2022-03-15 21:29:15,913 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:15,914 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:15,919 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 62 transitions. [2022-03-15 21:29:15,919 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:16,099 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:29:16,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:29:16,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:29:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:29:16,100 INFO L87 Difference]: Start difference. First operand 333 states and 872 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 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 21:29:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:16,237 INFO L93 Difference]: Finished difference Result 425 states and 1044 transitions. [2022-03-15 21:29:16,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:29:16,238 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:29:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:16,238 INFO L225 Difference]: With dead ends: 425 [2022-03-15 21:29:16,238 INFO L226 Difference]: Without dead ends: 422 [2022-03-15 21:29:16,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:29:16,239 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:16,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:16,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-03-15 21:29:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 378. [2022-03-15 21:29:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.623342175066313) internal successors, (989), 377 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 989 transitions. [2022-03-15 21:29:16,244 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 989 transitions. Word has length 20 [2022-03-15 21:29:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:16,245 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 989 transitions. [2022-03-15 21:29:16,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 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 21:29:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 989 transitions. [2022-03-15 21:29:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:29:16,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:16,245 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:16,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-15 21:29:16,459 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 21:29:16,459 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:16,460 INFO L85 PathProgramCache]: Analyzing trace with hash 184770242, now seen corresponding path program 126 times [2022-03-15 21:29:16,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:16,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857305268] [2022-03-15 21:29:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:16,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:16,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:16,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857305268] [2022-03-15 21:29:16,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857305268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:16,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965946785] [2022-03-15 21:29:16,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:16,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:16,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:16,508 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 21:29:16,512 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 21:29:16,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:29:16,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:16,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:29:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:16,965 INFO L353 Elim1Store]: treesize reduction 572, result has 22.8 percent of original size [2022-03-15 21:29:16,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 201 treesize of output 237 [2022-03-15 21:29:17,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:17,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 275 treesize of output 211 [2022-03-15 21:29:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:17,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:17,568 INFO L353 Elim1Store]: treesize reduction 96, result has 43.2 percent of original size [2022-03-15 21:29:17,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 200 treesize of output 178 [2022-03-15 21:29:17,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:17,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-03-15 21:29:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:17,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965946785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:17,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:17,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 29 [2022-03-15 21:29:17,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [321696306] [2022-03-15 21:29:17,814 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:17,815 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:17,818 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:29:17,818 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:17,874 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [116337#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:29:17,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:29:17,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:29:17,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:29:17,875 INFO L87 Difference]: Start difference. First operand 378 states and 989 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 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 21:29:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:18,021 INFO L93 Difference]: Finished difference Result 513 states and 1259 transitions. [2022-03-15 21:29:18,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:29:18,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 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 20 [2022-03-15 21:29:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:18,022 INFO L225 Difference]: With dead ends: 513 [2022-03-15 21:29:18,022 INFO L226 Difference]: Without dead ends: 510 [2022-03-15 21:29:18,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:29:18,022 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:18,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-03-15 21:29:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 424. [2022-03-15 21:29:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.6808510638297873) internal successors, (1134), 423 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1134 transitions. [2022-03-15 21:29:18,027 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1134 transitions. Word has length 20 [2022-03-15 21:29:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:18,028 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1134 transitions. [2022-03-15 21:29:18,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 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 21:29:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1134 transitions. [2022-03-15 21:29:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:29:18,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:18,028 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:18,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-15 21:29:18,229 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 21:29:18,229 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:18,230 INFO L85 PathProgramCache]: Analyzing trace with hash -996136446, now seen corresponding path program 127 times [2022-03-15 21:29:18,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:18,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944254420] [2022-03-15 21:29:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:18,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:18,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:18,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944254420] [2022-03-15 21:29:18,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944254420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:18,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709054740] [2022-03-15 21:29:18,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:18,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:18,277 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 21:29:18,277 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 21:29:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 21:29:18,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:18,602 INFO L353 Elim1Store]: treesize reduction 313, result has 30.3 percent of original size [2022-03-15 21:29:18,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 158 treesize of output 188 [2022-03-15 21:29:18,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:18,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 235 treesize of output 211 [2022-03-15 21:29:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:19,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:19,406 INFO L353 Elim1Store]: treesize reduction 92, result has 45.6 percent of original size [2022-03-15 21:29:19,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 168 treesize of output 176 [2022-03-15 21:29:19,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:19,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-03-15 21:29:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:19,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709054740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:19,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:19,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 27 [2022-03-15 21:29:19,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1131279163] [2022-03-15 21:29:19,684 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:19,685 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:19,689 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:29:19,689 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:19,777 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [117892#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 117891#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:29:19,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:29:19,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:19,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:29:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:29:19,778 INFO L87 Difference]: Start difference. First operand 424 states and 1134 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:19,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:19,932 INFO L93 Difference]: Finished difference Result 562 states and 1405 transitions. [2022-03-15 21:29:19,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:29:19,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:29:19,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:19,933 INFO L225 Difference]: With dead ends: 562 [2022-03-15 21:29:19,933 INFO L226 Difference]: Without dead ends: 559 [2022-03-15 21:29:19,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:29:19,934 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:19,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-03-15 21:29:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 462. [2022-03-15 21:29:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.7288503253796095) internal successors, (1258), 461 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1258 transitions. [2022-03-15 21:29:19,939 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1258 transitions. Word has length 20 [2022-03-15 21:29:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:19,939 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1258 transitions. [2022-03-15 21:29:19,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1258 transitions. [2022-03-15 21:29:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:29:19,940 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:19,940 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:19,955 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 21:29:20,140 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 21:29:20,140 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:20,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1050461890, now seen corresponding path program 128 times [2022-03-15 21:29:20,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:20,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674751767] [2022-03-15 21:29:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:20,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:20,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:20,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674751767] [2022-03-15 21:29:20,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674751767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:20,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225055409] [2022-03-15 21:29:20,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:20,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:20,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:20,201 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 21:29:20,210 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 21:29:20,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:20,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 21:29:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:20,499 INFO L353 Elim1Store]: treesize reduction 186, result has 39.8 percent of original size [2022-03-15 21:29:20,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 160 treesize of output 171 [2022-03-15 21:29:21,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:21,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 211 [2022-03-15 21:29:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:21,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:21,388 INFO L353 Elim1Store]: treesize reduction 144, result has 36.0 percent of original size [2022-03-15 21:29:21,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 172 treesize of output 196 [2022-03-15 21:29:21,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:21,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-03-15 21:29:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:21,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225055409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:21,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:21,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 26 [2022-03-15 21:29:21,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1308756808] [2022-03-15 21:29:21,604 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:21,605 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:21,608 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:29:21,608 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:21,722 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [119522#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 119521#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0)), 119523#(or (not (= (select f_inv (select f counter)) counter)) (= (select f (select f (select f counter))) 0) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter))))] [2022-03-15 21:29:21,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:29:21,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:21,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:29:21,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:29:21,723 INFO L87 Difference]: Start difference. First operand 462 states and 1258 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) 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 21:29:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:21,878 INFO L93 Difference]: Finished difference Result 603 states and 1531 transitions. [2022-03-15 21:29:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:29:21,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) 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 20 [2022-03-15 21:29:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:21,879 INFO L225 Difference]: With dead ends: 603 [2022-03-15 21:29:21,879 INFO L226 Difference]: Without dead ends: 600 [2022-03-15 21:29:21,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:29:21,880 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:21,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-03-15 21:29:21,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 500. [2022-03-15 21:29:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.7715430861723447) internal successors, (1383), 499 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1383 transitions. [2022-03-15 21:29:21,885 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1383 transitions. Word has length 20 [2022-03-15 21:29:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:21,886 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1383 transitions. [2022-03-15 21:29:21,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) 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 21:29:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1383 transitions. [2022-03-15 21:29:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:29:21,886 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:21,886 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:21,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:22,086 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 21:29:22,087 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:22,087 INFO L85 PathProgramCache]: Analyzing trace with hash 70500866, now seen corresponding path program 129 times [2022-03-15 21:29:22,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:22,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395224382] [2022-03-15 21:29:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:22,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:22,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:22,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395224382] [2022-03-15 21:29:22,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395224382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:22,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589504515] [2022-03-15 21:29:22,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:22,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:22,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:22,140 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 21:29:22,166 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 21:29:22,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:29:22,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:22,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:29:22,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:22,532 INFO L353 Elim1Store]: treesize reduction 165, result has 38.2 percent of original size [2022-03-15 21:29:22,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 213 treesize of output 176 [2022-03-15 21:29:22,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:22,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 231 treesize of output 211 [2022-03-15 21:29:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:22,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:22,991 INFO L353 Elim1Store]: treesize reduction 204, result has 29.4 percent of original size [2022-03-15 21:29:22,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 168 treesize of output 212 [2022-03-15 21:29:23,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:23,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-03-15 21:29:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:23,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589504515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:23,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:23,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 29 [2022-03-15 21:29:23,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1144281039] [2022-03-15 21:29:23,248 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:23,249 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:23,252 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:29:23,252 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:23,373 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [121226#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 121272#(or (not (= (select f_inv (select f counter)) counter)) (= (select f (select f (select f counter))) 0) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 121222#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0)), 121273#(or (not (= (select f (select f (select f counter))) (select f_inv (select f (select f (select f (select f counter))))))) (not (= (select f_inv (select f counter)) counter)) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter))) (= (select f (select f (select f (select f counter)))) 0))] [2022-03-15 21:29:23,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:29:23,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:23,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:29:23,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:29:23,373 INFO L87 Difference]: Start difference. First operand 500 states and 1383 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 21:29:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:23,532 INFO L93 Difference]: Finished difference Result 644 states and 1659 transitions. [2022-03-15 21:29:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:29:23,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:29:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:23,533 INFO L225 Difference]: With dead ends: 644 [2022-03-15 21:29:23,533 INFO L226 Difference]: Without dead ends: 641 [2022-03-15 21:29:23,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:29:23,533 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:23,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:23,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-03-15 21:29:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 538. [2022-03-15 21:29:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.808193668528864) internal successors, (1508), 537 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1508 transitions. [2022-03-15 21:29:23,540 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1508 transitions. Word has length 20 [2022-03-15 21:29:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:23,540 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1508 transitions. [2022-03-15 21:29:23,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 21:29:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1508 transitions. [2022-03-15 21:29:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:29:23,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:23,541 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:23,556 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 21:29:23,741 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 21:29:23,741 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash -243519806, now seen corresponding path program 130 times [2022-03-15 21:29:23,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:23,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223474042] [2022-03-15 21:29:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:23,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:23,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:23,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223474042] [2022-03-15 21:29:23,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223474042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:23,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134957134] [2022-03-15 21:29:23,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:23,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:23,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:23,801 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 21:29:23,827 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 21:29:23,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:23,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:23,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 21:29:23,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:24,011 INFO L353 Elim1Store]: treesize reduction 48, result has 63.4 percent of original size [2022-03-15 21:29:24,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 140 treesize of output 129 [2022-03-15 21:29:31,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:31,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 207 treesize of output 211 [2022-03-15 21:29:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:31,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:31,985 INFO L353 Elim1Store]: treesize reduction 272, result has 24.7 percent of original size [2022-03-15 21:29:31,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 156 treesize of output 224 [2022-03-15 21:29:32,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:32,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 326 treesize of output 220 [2022-03-15 21:29:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:32,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134957134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:32,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:32,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 24 [2022-03-15 21:29:32,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [350947201] [2022-03-15 21:29:32,283 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:32,284 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:32,287 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:29:32,288 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:32,465 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [123136#(or (not (= (select f_inv (select f counter)) counter)) (= (select f (select f (select f counter))) 0) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 123134#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0)), 123138#(or (not (= (select f (select f (select f counter))) (select f_inv (select f (select f (select f (select f counter))))))) (= (select f (select f (select f (select f (select f counter))))) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f (select f (select f (select f counter)))))) (select f (select f (select f (select f counter)))))) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 123135#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 123137#(or (not (= (select f (select f (select f counter))) (select f_inv (select f (select f (select f (select f counter))))))) (not (= (select f_inv (select f counter)) counter)) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter))) (= (select f (select f (select f (select f counter)))) 0))] [2022-03-15 21:29:32,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:29:32,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:29:32,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:29:32,465 INFO L87 Difference]: Start difference. First operand 538 states and 1508 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 21:29:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:32,608 INFO L93 Difference]: Finished difference Result 674 states and 1756 transitions. [2022-03-15 21:29:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:29:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:29:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:32,610 INFO L225 Difference]: With dead ends: 674 [2022-03-15 21:29:32,610 INFO L226 Difference]: Without dead ends: 671 [2022-03-15 21:29:32,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:29:32,610 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:32,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-03-15 21:29:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 568. [2022-03-15 21:29:32,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 2.834215167548501) internal successors, (1607), 567 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1607 transitions. [2022-03-15 21:29:32,620 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1607 transitions. Word has length 20 [2022-03-15 21:29:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:32,620 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 1607 transitions. [2022-03-15 21:29:32,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 21:29:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1607 transitions. [2022-03-15 21:29:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:29:32,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:32,621 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:32,645 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 21:29:32,835 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 21:29:32,835 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:32,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1388226046, now seen corresponding path program 131 times [2022-03-15 21:29:32,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:32,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614327685] [2022-03-15 21:29:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:32,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:32,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:32,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614327685] [2022-03-15 21:29:32,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614327685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:32,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068059457] [2022-03-15 21:29:32,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:32,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:32,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:32,880 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 21:29:32,881 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 21:29:32,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:29:32,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:32,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 21:29:32,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:33,130 INFO L353 Elim1Store]: treesize reduction 96, result has 43.2 percent of original size [2022-03-15 21:29:33,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 157 treesize of output 137 [2022-03-15 21:29:43,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:43,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-03-15 21:29:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:43,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:43,870 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-03-15 21:29:43,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-03-15 21:29:43,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:29:43,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-03-15 21:29:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:44,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068059457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:44,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:44,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 25 [2022-03-15 21:29:44,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [931321436] [2022-03-15 21:29:44,202 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:44,203 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:44,206 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:29:44,206 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:44,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:29:44,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:29:44,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:29:44,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:29:44,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:29:44,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:29:44,290 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:29:44,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:29:44,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:29:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:29:44,291 INFO L87 Difference]: Start difference. First operand 568 states and 1607 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:44,440 INFO L93 Difference]: Finished difference Result 669 states and 1776 transitions. [2022-03-15 21:29:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:29:44,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:29:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:44,441 INFO L225 Difference]: With dead ends: 669 [2022-03-15 21:29:44,441 INFO L226 Difference]: Without dead ends: 666 [2022-03-15 21:29:44,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:29:44,441 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:44,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-03-15 21:29:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 588. [2022-03-15 21:29:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.8500851788756387) internal successors, (1673), 587 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1673 transitions. [2022-03-15 21:29:44,448 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1673 transitions. Word has length 20 [2022-03-15 21:29:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:44,448 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1673 transitions. [2022-03-15 21:29:44,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1673 transitions. [2022-03-15 21:29:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:29:44,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:44,449 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:44,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-15 21:29:44,649 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 21:29:44,649 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1257184809, now seen corresponding path program 132 times [2022-03-15 21:29:44,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:44,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788165576] [2022-03-15 21:29:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:44,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:44,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:44,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788165576] [2022-03-15 21:29:44,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788165576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:44,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623501381] [2022-03-15 21:29:44,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:44,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:44,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:44,756 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 21:29:44,757 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 21:29:44,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:29:44,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:44,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:29:44,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:45,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:45,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623501381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:45,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:45,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-15 21:29:45,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1214927560] [2022-03-15 21:29:45,148 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:45,149 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:45,152 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 21:29:45,152 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:45,329 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [127090#(or (<= N1 (+ i1 4)) (< i2 N2)), 127086#(or (< i2 N2) (<= N1 i1)), 127085#(or (< i2 N2) (<= (+ N1 1) i1)), 127089#(or (<= N1 (+ 3 i1)) (< i2 N2)), 127088#(or (<= N1 (+ 2 i1)) (< i2 N2)), 127087#(or (<= N1 (+ i1 1)) (< i2 N2)), 127084#(< i2 N2)] [2022-03-15 21:29:45,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:29:45,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:29:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1270, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:29:45,330 INFO L87 Difference]: Start difference. First operand 588 states and 1673 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 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 21:29:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:45,590 INFO L93 Difference]: Finished difference Result 817 states and 2026 transitions. [2022-03-15 21:29:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:29:45,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:29:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:45,591 INFO L225 Difference]: With dead ends: 817 [2022-03-15 21:29:45,591 INFO L226 Difference]: Without dead ends: 796 [2022-03-15 21:29:45,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=784, Invalid=2186, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:29:45,592 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:45,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 0 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-03-15 21:29:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 475. [2022-03-15 21:29:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 2.8333333333333335) internal successors, (1343), 474 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1343 transitions. [2022-03-15 21:29:45,598 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1343 transitions. Word has length 20 [2022-03-15 21:29:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:45,598 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1343 transitions. [2022-03-15 21:29:45,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 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 21:29:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1343 transitions. [2022-03-15 21:29:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:45,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:45,599 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:45,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-15 21:29:45,820 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 21:29:45,821 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2012655405, now seen corresponding path program 133 times [2022-03-15 21:29:45,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:45,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876695568] [2022-03-15 21:29:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:45,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:45,944 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 21:29:45,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:45,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876695568] [2022-03-15 21:29:45,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876695568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:45,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587356441] [2022-03-15 21:29:45,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:45,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:45,945 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 21:29:45,946 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 21:29:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:45,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:46,227 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 21:29:46,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:46,383 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 21:29:46,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587356441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:46,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:46,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 21:29:46,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1766196246] [2022-03-15 21:29:46,384 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:46,385 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:46,390 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 67 transitions. [2022-03-15 21:29:46,390 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:46,714 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [129043#(or (<= N2 (+ i2 1)) (< i1 N1)), 129042#(or (<= N2 i2) (< i1 N1)), 129045#(or (<= N2 (+ 3 i2)) (< i1 N1)), 129046#(or (< i1 N1) (<= N2 (+ i2 4))), 129041#(< i1 N1), 129044#(or (< i1 N1) (<= N2 (+ 2 i2))), 129047#(or (< i1 N1) (<= N2 (+ 5 i2)))] [2022-03-15 21:29:46,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:29:46,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:29:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:29:46,715 INFO L87 Difference]: Start difference. First operand 475 states and 1343 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 21:29:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:47,034 INFO L93 Difference]: Finished difference Result 775 states and 1861 transitions. [2022-03-15 21:29:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:29:47,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 21 [2022-03-15 21:29:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:47,036 INFO L225 Difference]: With dead ends: 775 [2022-03-15 21:29:47,036 INFO L226 Difference]: Without dead ends: 760 [2022-03-15 21:29:47,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=907, Invalid=2515, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:29:47,036 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:47,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:47,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-03-15 21:29:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 529. [2022-03-15 21:29:47,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.6818181818181817) internal successors, (1416), 528 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1416 transitions. [2022-03-15 21:29:47,042 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1416 transitions. Word has length 21 [2022-03-15 21:29:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:47,042 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1416 transitions. [2022-03-15 21:29:47,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 21:29:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1416 transitions. [2022-03-15 21:29:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:47,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:47,043 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:47,058 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 21:29:47,244 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 21:29:47,244 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:47,244 INFO L85 PathProgramCache]: Analyzing trace with hash 753577238, now seen corresponding path program 134 times [2022-03-15 21:29:47,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:47,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999895176] [2022-03-15 21:29:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:47,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:47,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:47,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999895176] [2022-03-15 21:29:47,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999895176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:47,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174168190] [2022-03-15 21:29:47,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:47,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:47,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:47,394 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 21:29:47,394 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 21:29:47,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:47,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:47,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:47,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:47,805 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 21:29:47,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174168190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:47,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:47,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2022-03-15 21:29:47,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [384167014] [2022-03-15 21:29:47,806 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:47,807 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:47,812 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 65 transitions. [2022-03-15 21:29:47,812 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:48,152 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [131071#(or (< i1 N1) (<= (+ 2 i2) N2)), 131072#(or (< i1 N1) (<= (+ 3 i2) N2)), 131073#(or (<= (+ i2 4) N2) (< i1 N1)), 131070#(or (< i2 N2) (< i1 N1)), 131074#(or (< i1 N1) (<= (+ 5 i2) N2)), 131069#(< i1 N1), 131075#(or (< i1 N1) (<= (+ 6 i2) N2))] [2022-03-15 21:29:48,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:29:48,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:48,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:29:48,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:29:48,153 INFO L87 Difference]: Start difference. First operand 529 states and 1416 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:48,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:48,432 INFO L93 Difference]: Finished difference Result 654 states and 1597 transitions. [2022-03-15 21:29:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:29:48,432 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:29:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:48,433 INFO L225 Difference]: With dead ends: 654 [2022-03-15 21:29:48,433 INFO L226 Difference]: Without dead ends: 632 [2022-03-15 21:29:48,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=697, Invalid=2609, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:29:48,433 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:48,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:48,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-03-15 21:29:48,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 521. [2022-03-15 21:29:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.6576923076923076) internal successors, (1382), 520 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1382 transitions. [2022-03-15 21:29:48,439 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1382 transitions. Word has length 21 [2022-03-15 21:29:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:48,439 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 1382 transitions. [2022-03-15 21:29:48,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1382 transitions. [2022-03-15 21:29:48,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:48,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:48,439 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:48,454 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 21:29:48,640 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 21:29:48,640 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:48,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:48,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1561212790, now seen corresponding path program 135 times [2022-03-15 21:29:48,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:48,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706275720] [2022-03-15 21:29:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:48,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:48,724 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 21:29:48,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:48,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706275720] [2022-03-15 21:29:48,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706275720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:48,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104160232] [2022-03-15 21:29:48,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:48,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:48,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:48,726 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 21:29:48,726 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 21:29:48,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:29:48,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:48,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:48,984 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 21:29:48,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:49,217 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 21:29:49,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104160232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:49,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:49,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 36 [2022-03-15 21:29:49,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1126457154] [2022-03-15 21:29:49,218 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:49,218 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:49,222 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:29:49,222 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:49,305 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [132955#(< i2 N2)] [2022-03-15 21:29:49,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:29:49,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:49,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:29:49,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1048, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:49,306 INFO L87 Difference]: Start difference. First operand 521 states and 1382 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 21:29:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:49,590 INFO L93 Difference]: Finished difference Result 581 states and 1484 transitions. [2022-03-15 21:29:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:29:49,590 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 21:29:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:49,591 INFO L225 Difference]: With dead ends: 581 [2022-03-15 21:29:49,591 INFO L226 Difference]: Without dead ends: 580 [2022-03-15 21:29:49,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:29:49,592 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:49,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-03-15 21:29:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 521. [2022-03-15 21:29:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.6557692307692307) internal successors, (1381), 520 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1381 transitions. [2022-03-15 21:29:49,597 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1381 transitions. Word has length 21 [2022-03-15 21:29:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:49,597 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 1381 transitions. [2022-03-15 21:29:49,597 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 21:29:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1381 transitions. [2022-03-15 21:29:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:49,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:49,598 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:49,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-15 21:29:49,798 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 21:29:49,798 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1432887149, now seen corresponding path program 136 times [2022-03-15 21:29:49,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:49,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503994956] [2022-03-15 21:29:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:49,878 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 21:29:49,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:49,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503994956] [2022-03-15 21:29:49,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503994956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:49,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651007412] [2022-03-15 21:29:49,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:49,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:49,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:49,879 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 21:29:49,880 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 21:29:49,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:49,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:49,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:50,148 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 21:29:50,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:50,419 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 21:29:50,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651007412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:50,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:50,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 36 [2022-03-15 21:29:50,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [803109417] [2022-03-15 21:29:50,419 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:50,420 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:50,424 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:29:50,424 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:50,498 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [134772#(< i1 N1)] [2022-03-15 21:29:50,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:29:50,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:50,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:29:50,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1062, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:50,499 INFO L87 Difference]: Start difference. First operand 521 states and 1381 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:50,676 INFO L93 Difference]: Finished difference Result 697 states and 1664 transitions. [2022-03-15 21:29:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:29:50,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:29:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:50,677 INFO L225 Difference]: With dead ends: 697 [2022-03-15 21:29:50,677 INFO L226 Difference]: Without dead ends: 695 [2022-03-15 21:29:50,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:29:50,677 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:50,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-03-15 21:29:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 530. [2022-03-15 21:29:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.6446124763705106) internal successors, (1399), 529 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1399 transitions. [2022-03-15 21:29:50,684 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1399 transitions. Word has length 21 [2022-03-15 21:29:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:50,684 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1399 transitions. [2022-03-15 21:29:50,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1399 transitions. [2022-03-15 21:29:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:50,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:50,684 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:50,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-15 21:29:50,885 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 21:29:50,885 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1493630998, now seen corresponding path program 137 times [2022-03-15 21:29:50,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:50,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080283767] [2022-03-15 21:29:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:50,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:50,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:50,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080283767] [2022-03-15 21:29:50,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080283767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:50,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054860959] [2022-03-15 21:29:50,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:50,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:50,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:50,978 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 21:29:50,979 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 21:29:51,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:29:51,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:51,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:51,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054860959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:51,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:51,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 37 [2022-03-15 21:29:51,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [99938033] [2022-03-15 21:29:51,512 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:51,513 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:51,517 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:29:51,517 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:51,646 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [136704#(< i1 N1), 136705#(or (< (+ i1 1) N1) (<= N1 i1)), 136706#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:29:51,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:29:51,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:29:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:29:51,646 INFO L87 Difference]: Start difference. First operand 530 states and 1399 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 21:29:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:52,315 INFO L93 Difference]: Finished difference Result 744 states and 1758 transitions. [2022-03-15 21:29:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:29:52,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 21:29:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:52,317 INFO L225 Difference]: With dead ends: 744 [2022-03-15 21:29:52,317 INFO L226 Difference]: Without dead ends: 742 [2022-03-15 21:29:52,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1027, Invalid=3803, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:29:52,317 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:52,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-03-15 21:29:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 550. [2022-03-15 21:29:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 2.6484517304189437) internal successors, (1454), 549 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1454 transitions. [2022-03-15 21:29:52,324 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1454 transitions. Word has length 21 [2022-03-15 21:29:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:52,324 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 1454 transitions. [2022-03-15 21:29:52,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 21:29:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1454 transitions. [2022-03-15 21:29:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:52,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:52,324 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:52,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-15 21:29:52,525 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 21:29:52,525 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:52,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1913832617, now seen corresponding path program 138 times [2022-03-15 21:29:52,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:52,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664710234] [2022-03-15 21:29:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:52,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:52,625 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 21:29:52,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:52,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664710234] [2022-03-15 21:29:52,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664710234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:52,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784859412] [2022-03-15 21:29:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:52,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:52,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:52,627 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 21:29:52,627 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 21:29:52,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:29:52,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:52,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:52,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:52,898 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 21:29:52,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:53,193 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 21:29:53,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784859412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:53,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:53,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 38 [2022-03-15 21:29:53,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1396648354] [2022-03-15 21:29:53,194 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:53,195 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:53,198 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:29:53,198 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:53,280 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [138709#(< i1 N1), 138768#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:29:53,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:29:53,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:53,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:29:53,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:29:53,281 INFO L87 Difference]: Start difference. First operand 550 states and 1454 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 21:29:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:53,501 INFO L93 Difference]: Finished difference Result 747 states and 1772 transitions. [2022-03-15 21:29:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:29:53,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 21:29:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:53,502 INFO L225 Difference]: With dead ends: 747 [2022-03-15 21:29:53,503 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 21:29:53,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=509, Invalid=1843, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:29:53,503 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:53,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 21:29:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 552. [2022-03-15 21:29:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.6497277676951) internal successors, (1460), 551 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1460 transitions. [2022-03-15 21:29:53,510 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1460 transitions. Word has length 21 [2022-03-15 21:29:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:53,510 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1460 transitions. [2022-03-15 21:29:53,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 21:29:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1460 transitions. [2022-03-15 21:29:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:53,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:53,511 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:53,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-15 21:29:53,711 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 21:29:53,711 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash -815481811, now seen corresponding path program 139 times [2022-03-15 21:29:53,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:53,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574471231] [2022-03-15 21:29:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:53,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:53,794 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 21:29:53,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:53,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574471231] [2022-03-15 21:29:53,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574471231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:53,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662917775] [2022-03-15 21:29:53,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:53,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:53,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:53,796 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 21:29:53,807 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 21:29:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:53,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:53,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:54,118 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 21:29:54,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:54,382 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 21:29:54,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662917775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:54,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:54,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 36 [2022-03-15 21:29:54,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2033231121] [2022-03-15 21:29:54,383 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:54,383 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:54,387 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:29:54,387 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:54,450 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [140795#(< i1 N1)] [2022-03-15 21:29:54,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:29:54,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:29:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1067, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:54,451 INFO L87 Difference]: Start difference. First operand 552 states and 1460 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 21:29:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:54,653 INFO L93 Difference]: Finished difference Result 775 states and 1835 transitions. [2022-03-15 21:29:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:29:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 21:29:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:54,655 INFO L225 Difference]: With dead ends: 775 [2022-03-15 21:29:54,655 INFO L226 Difference]: Without dead ends: 771 [2022-03-15 21:29:54,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:29:54,656 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:54,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-15 21:29:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 569. [2022-03-15 21:29:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.6461267605633805) internal successors, (1503), 568 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1503 transitions. [2022-03-15 21:29:54,663 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1503 transitions. Word has length 21 [2022-03-15 21:29:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:54,663 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1503 transitions. [2022-03-15 21:29:54,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 21:29:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1503 transitions. [2022-03-15 21:29:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:54,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:54,663 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:54,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-15 21:29:54,864 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 21:29:54,864 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash -754737962, now seen corresponding path program 140 times [2022-03-15 21:29:54,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:54,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40982203] [2022-03-15 21:29:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:54,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:54,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:54,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40982203] [2022-03-15 21:29:54,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40982203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:54,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712719910] [2022-03-15 21:29:54,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:54,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:54,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:54,953 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 21:29:54,954 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 21:29:54,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:54,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:54,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:55,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:55,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712719910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:55,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:55,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 37 [2022-03-15 21:29:55,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1001184916] [2022-03-15 21:29:55,491 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:55,492 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:55,495 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:29:55,495 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:55,630 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [142890#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 142887#(< i1 N1), 142888#(or (< (+ i1 1) N1) (<= N1 i1)), 142889#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:29:55,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:29:55,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:55,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:29:55,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1390, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:29:55,631 INFO L87 Difference]: Start difference. First operand 569 states and 1503 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 21:29:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:56,400 INFO L93 Difference]: Finished difference Result 837 states and 1948 transitions. [2022-03-15 21:29:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:29:56,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 21:29:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:56,402 INFO L225 Difference]: With dead ends: 837 [2022-03-15 21:29:56,402 INFO L226 Difference]: Without dead ends: 832 [2022-03-15 21:29:56,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:29:56,403 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 113 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:56,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 0 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-03-15 21:29:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 588. [2022-03-15 21:29:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.6490630323679727) internal successors, (1555), 587 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1555 transitions. [2022-03-15 21:29:56,410 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1555 transitions. Word has length 21 [2022-03-15 21:29:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:56,410 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1555 transitions. [2022-03-15 21:29:56,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 21:29:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1555 transitions. [2022-03-15 21:29:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:56,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:56,410 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:56,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:56,611 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 21:29:56,611 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash 132765719, now seen corresponding path program 141 times [2022-03-15 21:29:56,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:56,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18025989] [2022-03-15 21:29:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:56,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:56,705 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 21:29:56,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:56,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18025989] [2022-03-15 21:29:56,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18025989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:56,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511615353] [2022-03-15 21:29:56,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:56,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:56,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:56,707 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 21:29:56,707 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 21:29:56,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:29:56,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:56,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:56,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:56,993 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 21:29:56,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:57,269 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 21:29:57,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511615353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:57,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:57,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 38 [2022-03-15 21:29:57,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [608917107] [2022-03-15 21:29:57,269 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:57,270 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:57,274 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 35 transitions. [2022-03-15 21:29:57,274 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:57,343 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [145127#(or (< (+ i1 1) N1) (<= N1 i1)), 145068#(< i1 N1)] [2022-03-15 21:29:57,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:29:57,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:57,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:29:57,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:29:57,344 INFO L87 Difference]: Start difference. First operand 588 states and 1555 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 21:29:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:57,537 INFO L93 Difference]: Finished difference Result 752 states and 1800 transitions. [2022-03-15 21:29:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:29:57,538 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 21 [2022-03-15 21:29:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:57,539 INFO L225 Difference]: With dead ends: 752 [2022-03-15 21:29:57,539 INFO L226 Difference]: Without dead ends: 752 [2022-03-15 21:29:57,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=1798, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:29:57,539 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:57,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-03-15 21:29:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 577. [2022-03-15 21:29:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.626736111111111) internal successors, (1513), 576 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1513 transitions. [2022-03-15 21:29:57,546 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1513 transitions. Word has length 21 [2022-03-15 21:29:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:57,546 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 1513 transitions. [2022-03-15 21:29:57,546 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 21:29:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1513 transitions. [2022-03-15 21:29:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:57,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:57,547 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:57,563 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 21:29:57,747 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 21:29:57,748 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:57,748 INFO L85 PathProgramCache]: Analyzing trace with hash 988072373, now seen corresponding path program 142 times [2022-03-15 21:29:57,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:57,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799987120] [2022-03-15 21:29:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:57,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:57,847 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 21:29:57,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:57,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799987120] [2022-03-15 21:29:57,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799987120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:57,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33018087] [2022-03-15 21:29:57,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:57,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:57,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:57,848 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 21:29:57,849 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 21:29:57,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:57,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:57,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:58,124 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 21:29:58,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:58,413 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 21:29:58,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33018087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:58,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:58,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 39 [2022-03-15 21:29:58,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1247139393] [2022-03-15 21:29:58,413 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:58,414 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:58,418 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:29:58,418 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:58,516 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [147210#(or (< (+ i1 1) N1) (<= N1 i1)), 147151#(< i1 N1), 147211#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:29:58,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:29:58,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:29:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:29:58,517 INFO L87 Difference]: Start difference. First operand 577 states and 1513 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 21:29:58,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:58,795 INFO L93 Difference]: Finished difference Result 772 states and 1828 transitions. [2022-03-15 21:29:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:29:58,795 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 21 [2022-03-15 21:29:58,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:58,796 INFO L225 Difference]: With dead ends: 772 [2022-03-15 21:29:58,796 INFO L226 Difference]: Without dead ends: 772 [2022-03-15 21:29:58,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=590, Invalid=2272, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:29:58,796 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:58,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-03-15 21:29:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 583. [2022-03-15 21:29:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.6305841924398625) internal successors, (1531), 582 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1531 transitions. [2022-03-15 21:29:58,803 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1531 transitions. Word has length 21 [2022-03-15 21:29:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:58,803 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1531 transitions. [2022-03-15 21:29:58,804 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 21:29:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1531 transitions. [2022-03-15 21:29:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:58,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:58,804 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:58,820 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 21:29:59,004 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 21:29:59,005 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:59,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1795442835, now seen corresponding path program 143 times [2022-03-15 21:29:59,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:59,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870947727] [2022-03-15 21:29:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:59,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:59,082 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 21:29:59,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:59,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870947727] [2022-03-15 21:29:59,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870947727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:59,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231512899] [2022-03-15 21:29:59,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:59,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:59,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:59,083 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 21:29:59,084 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 21:29:59,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:29:59,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:59,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:29:59,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:59,351 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 21:29:59,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:59,610 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 21:29:59,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231512899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:59,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:59,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 36 [2022-03-15 21:29:59,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [147670077] [2022-03-15 21:29:59,611 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:59,612 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:59,615 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 35 transitions. [2022-03-15 21:29:59,615 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:59,668 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [149331#(< i1 N1)] [2022-03-15 21:29:59,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:29:59,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:29:59,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:59,668 INFO L87 Difference]: Start difference. First operand 583 states and 1531 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:59,898 INFO L93 Difference]: Finished difference Result 809 states and 1920 transitions. [2022-03-15 21:29:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:29:59,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:29:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:59,900 INFO L225 Difference]: With dead ends: 809 [2022-03-15 21:29:59,900 INFO L226 Difference]: Without dead ends: 805 [2022-03-15 21:29:59,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=1820, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:29:59,900 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:59,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:59,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-03-15 21:29:59,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 601. [2022-03-15 21:29:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 2.6416666666666666) internal successors, (1585), 600 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1585 transitions. [2022-03-15 21:29:59,907 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1585 transitions. Word has length 21 [2022-03-15 21:29:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:59,907 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1585 transitions. [2022-03-15 21:29:59,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1585 transitions. [2022-03-15 21:29:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:29:59,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:59,908 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:59,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-15 21:30:00,108 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 21:30:00,109 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:00,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1734698986, now seen corresponding path program 144 times [2022-03-15 21:30:00,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:00,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285716248] [2022-03-15 21:30:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:00,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:00,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285716248] [2022-03-15 21:30:00,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285716248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:00,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161727108] [2022-03-15 21:30:00,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:30:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:00,202 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 21:30:00,202 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 21:30:00,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:30:00,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:00,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:00,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161727108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:00,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:00,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 37 [2022-03-15 21:30:00,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1584181059] [2022-03-15 21:30:00,749 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:00,750 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:00,754 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:30:00,754 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:00,908 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [151529#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 151528#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 151525#(< i1 N1), 151527#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 151526#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:30:00,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:30:00,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:30:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:30:00,909 INFO L87 Difference]: Start difference. First operand 601 states and 1585 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 21:30:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:01,781 INFO L93 Difference]: Finished difference Result 889 states and 2055 transitions. [2022-03-15 21:30:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:30:01,781 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 21 [2022-03-15 21:30:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:01,782 INFO L225 Difference]: With dead ends: 889 [2022-03-15 21:30:01,782 INFO L226 Difference]: Without dead ends: 882 [2022-03-15 21:30:01,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1226, Invalid=4626, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:30:01,783 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:01,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:01,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-03-15 21:30:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 618. [2022-03-15 21:30:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 2.640194489465154) internal successors, (1629), 617 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1629 transitions. [2022-03-15 21:30:01,790 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1629 transitions. Word has length 21 [2022-03-15 21:30:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:01,791 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 1629 transitions. [2022-03-15 21:30:01,791 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 21:30:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1629 transitions. [2022-03-15 21:30:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:01,791 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:01,791 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:01,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-15 21:30:01,992 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 21:30:01,992 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash -847195305, now seen corresponding path program 145 times [2022-03-15 21:30:01,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:01,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171793164] [2022-03-15 21:30:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:01,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:02,082 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 21:30:02,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:02,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171793164] [2022-03-15 21:30:02,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171793164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:02,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333453514] [2022-03-15 21:30:02,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:30:02,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:02,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:02,084 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 21:30:02,084 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 21:30:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:02,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:02,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:02,356 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 21:30:02,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:02,627 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 21:30:02,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333453514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:02,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:02,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 38 [2022-03-15 21:30:02,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [146428939] [2022-03-15 21:30:02,628 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:02,629 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:02,632 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:30:02,632 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:02,690 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [153882#(or (< (+ i1 1) N1) (<= N1 i1)), 153823#(< i1 N1)] [2022-03-15 21:30:02,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:30:02,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:30:02,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:30:02,691 INFO L87 Difference]: Start difference. First operand 618 states and 1629 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 21:30:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:02,901 INFO L93 Difference]: Finished difference Result 830 states and 1972 transitions. [2022-03-15 21:30:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:30:02,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 21:30:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:02,902 INFO L225 Difference]: With dead ends: 830 [2022-03-15 21:30:02,902 INFO L226 Difference]: Without dead ends: 828 [2022-03-15 21:30:02,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=504, Invalid=1946, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:30:02,903 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:02,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-03-15 21:30:02,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 619. [2022-03-15 21:30:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.632686084142395) internal successors, (1627), 618 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 21:30:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1627 transitions. [2022-03-15 21:30:02,910 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1627 transitions. Word has length 21 [2022-03-15 21:30:02,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:02,910 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1627 transitions. [2022-03-15 21:30:02,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 21:30:02,911 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1627 transitions. [2022-03-15 21:30:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:02,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:02,911 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:02,927 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 21:30:03,111 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 21:30:03,112 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash 8111349, now seen corresponding path program 146 times [2022-03-15 21:30:03,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:03,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032922817] [2022-03-15 21:30:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:03,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:03,207 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 21:30:03,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:03,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032922817] [2022-03-15 21:30:03,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032922817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:03,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197073057] [2022-03-15 21:30:03,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:30:03,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:03,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:03,209 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 21:30:03,209 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 21:30:03,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:30:03,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:03,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:03,478 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 21:30:03,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:03,750 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 21:30:03,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197073057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:03,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:03,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 39 [2022-03-15 21:30:03,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1844934856] [2022-03-15 21:30:03,751 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:03,752 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:03,755 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 35 transitions. [2022-03-15 21:30:03,756 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:03,842 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [156072#(< i1 N1), 156131#(or (< (+ i1 1) N1) (<= N1 i1)), 156132#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:30:03,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:30:03,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:30:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:30:03,843 INFO L87 Difference]: Start difference. First operand 619 states and 1627 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:04,078 INFO L93 Difference]: Finished difference Result 754 states and 1815 transitions. [2022-03-15 21:30:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:30:04,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:30:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:04,080 INFO L225 Difference]: With dead ends: 754 [2022-03-15 21:30:04,080 INFO L226 Difference]: Without dead ends: 754 [2022-03-15 21:30:04,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:30:04,080 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:04,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-03-15 21:30:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 599. [2022-03-15 21:30:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.6187290969899664) internal successors, (1566), 598 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1566 transitions. [2022-03-15 21:30:04,088 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1566 transitions. Word has length 21 [2022-03-15 21:30:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:04,088 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1566 transitions. [2022-03-15 21:30:04,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1566 transitions. [2022-03-15 21:30:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:04,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:04,088 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:04,105 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 21:30:04,289 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 21:30:04,289 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash 752813847, now seen corresponding path program 147 times [2022-03-15 21:30:04,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:04,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067553713] [2022-03-15 21:30:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:04,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:04,391 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 21:30:04,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:04,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067553713] [2022-03-15 21:30:04,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067553713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:04,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715076894] [2022-03-15 21:30:04,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:04,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:04,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:04,393 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 21:30:04,393 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 21:30:04,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:30:04,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:04,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:04,670 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 21:30:04,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:04,945 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 21:30:04,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715076894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:04,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:04,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 40 [2022-03-15 21:30:04,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1675607698] [2022-03-15 21:30:04,946 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:04,947 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:04,950 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:30:04,950 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:05,067 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [158207#(< i1 N1), 158266#(or (< (+ i1 1) N1) (<= N1 i1)), 158267#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 158268#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:30:05,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:30:05,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:30:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:30:05,068 INFO L87 Difference]: Start difference. First operand 599 states and 1566 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:05,380 INFO L93 Difference]: Finished difference Result 762 states and 1817 transitions. [2022-03-15 21:30:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:30:05,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:30:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:05,381 INFO L225 Difference]: With dead ends: 762 [2022-03-15 21:30:05,381 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 21:30:05,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=2632, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:30:05,382 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:05,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 21:30:05,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 607. [2022-03-15 21:30:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.623762376237624) internal successors, (1590), 606 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1590 transitions. [2022-03-15 21:30:05,388 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1590 transitions. Word has length 21 [2022-03-15 21:30:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:05,388 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1590 transitions. [2022-03-15 21:30:05,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1590 transitions. [2022-03-15 21:30:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:05,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:05,389 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:05,406 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 21:30:05,591 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 21:30:05,591 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:05,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:05,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2109463507, now seen corresponding path program 148 times [2022-03-15 21:30:05,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:05,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37374175] [2022-03-15 21:30:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:05,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:05,701 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 21:30:05,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:05,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37374175] [2022-03-15 21:30:05,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37374175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:05,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650371115] [2022-03-15 21:30:05,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:05,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:05,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:05,702 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 21:30:05,703 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 21:30:05,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:05,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:05,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:05,973 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 21:30:05,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:06,227 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 21:30:06,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650371115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:06,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:06,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 36 [2022-03-15 21:30:06,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1095492568] [2022-03-15 21:30:06,227 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:06,228 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:06,231 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:30:06,231 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:06,272 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [160430#(< i1 N1)] [2022-03-15 21:30:06,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:30:06,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:06,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:30:06,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:30:06,273 INFO L87 Difference]: Start difference. First operand 607 states and 1590 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 21:30:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:06,524 INFO L93 Difference]: Finished difference Result 819 states and 1955 transitions. [2022-03-15 21:30:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:30:06,525 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 21 [2022-03-15 21:30:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:06,526 INFO L225 Difference]: With dead ends: 819 [2022-03-15 21:30:06,526 INFO L226 Difference]: Without dead ends: 815 [2022-03-15 21:30:06,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:30:06,526 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:06,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:06,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-03-15 21:30:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 624. [2022-03-15 21:30:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.6324237560192616) internal successors, (1640), 623 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1640 transitions. [2022-03-15 21:30:06,533 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1640 transitions. Word has length 21 [2022-03-15 21:30:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:06,533 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1640 transitions. [2022-03-15 21:30:06,533 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 21:30:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1640 transitions. [2022-03-15 21:30:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:06,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:06,534 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:06,550 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 21:30:06,734 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 21:30:06,734 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:06,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2048719658, now seen corresponding path program 149 times [2022-03-15 21:30:06,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:06,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112132663] [2022-03-15 21:30:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:06,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:06,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:06,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112132663] [2022-03-15 21:30:06,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112132663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:06,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672648335] [2022-03-15 21:30:06,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:06,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:06,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:06,825 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 21:30:06,825 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 21:30:06,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:30:06,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:06,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:06,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:07,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:07,376 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 21:30:07,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672648335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:07,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:07,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 37 [2022-03-15 21:30:07,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [258295081] [2022-03-15 21:30:07,376 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:07,377 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:07,381 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:30:07,381 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:07,567 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [162684#(< i1 N1), 162688#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 162685#(or (< (+ i1 1) N1) (<= N1 i1)), 162686#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 162689#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 162687#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:30:07,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:30:07,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:30:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:30:07,567 INFO L87 Difference]: Start difference. First operand 624 states and 1640 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 21:30:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:08,515 INFO L93 Difference]: Finished difference Result 915 states and 2102 transitions. [2022-03-15 21:30:08,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:30:08,515 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 21:30:08,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:08,516 INFO L225 Difference]: With dead ends: 915 [2022-03-15 21:30:08,516 INFO L226 Difference]: Without dead ends: 906 [2022-03-15 21:30:08,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1276, Invalid=4886, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 21:30:08,517 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:08,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-03-15 21:30:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 641. [2022-03-15 21:30:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.6234375) internal successors, (1679), 640 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1679 transitions. [2022-03-15 21:30:08,526 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1679 transitions. Word has length 21 [2022-03-15 21:30:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:08,526 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1679 transitions. [2022-03-15 21:30:08,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 21:30:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1679 transitions. [2022-03-15 21:30:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:08,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:08,526 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:08,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:08,727 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 21:30:08,727 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1161215977, now seen corresponding path program 150 times [2022-03-15 21:30:08,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:08,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871438685] [2022-03-15 21:30:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:08,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:08,819 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 21:30:08,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:08,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871438685] [2022-03-15 21:30:08,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871438685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:08,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065863153] [2022-03-15 21:30:08,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:30:08,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:08,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:08,821 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 21:30:08,822 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 21:30:08,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:30:08,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:08,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:08,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:09,094 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 21:30:09,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:09,367 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 21:30:09,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065863153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:09,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:09,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 38 [2022-03-15 21:30:09,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224034782] [2022-03-15 21:30:09,368 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:09,369 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:09,373 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2022-03-15 21:30:09,373 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:09,435 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [165116#(or (< (+ i1 1) N1) (<= N1 i1)), 165057#(< i1 N1)] [2022-03-15 21:30:09,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:30:09,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:09,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:30:09,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:30:09,436 INFO L87 Difference]: Start difference. First operand 641 states and 1679 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 21:30:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:09,698 INFO L93 Difference]: Finished difference Result 867 states and 2058 transitions. [2022-03-15 21:30:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:30:09,698 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 21 [2022-03-15 21:30:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:09,700 INFO L225 Difference]: With dead ends: 867 [2022-03-15 21:30:09,700 INFO L226 Difference]: Without dead ends: 865 [2022-03-15 21:30:09,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=526, Invalid=2024, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:30:09,700 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:09,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-03-15 21:30:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 647. [2022-03-15 21:30:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.6222910216718267) internal successors, (1694), 646 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1694 transitions. [2022-03-15 21:30:09,708 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1694 transitions. Word has length 21 [2022-03-15 21:30:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:09,708 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1694 transitions. [2022-03-15 21:30:09,708 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 21:30:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1694 transitions. [2022-03-15 21:30:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:09,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:09,709 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:09,726 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 21:30:09,909 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 21:30:09,909 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:09,910 INFO L85 PathProgramCache]: Analyzing trace with hash -305909323, now seen corresponding path program 151 times [2022-03-15 21:30:09,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:09,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697242361] [2022-03-15 21:30:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:09,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:10,005 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 21:30:10,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:10,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697242361] [2022-03-15 21:30:10,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697242361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:10,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142161310] [2022-03-15 21:30:10,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:30:10,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:10,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:10,007 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 21:30:10,007 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 21:30:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:10,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:10,276 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 21:30:10,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:10,543 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 21:30:10,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142161310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:10,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:10,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 39 [2022-03-15 21:30:10,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1098541460] [2022-03-15 21:30:10,544 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:10,545 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:10,548 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:30:10,548 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:10,625 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [167460#(or (< (+ i1 1) N1) (<= N1 i1)), 167461#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 167401#(< i1 N1)] [2022-03-15 21:30:10,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:30:10,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:10,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:30:10,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:30:10,625 INFO L87 Difference]: Start difference. First operand 647 states and 1694 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 21:30:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:10,918 INFO L93 Difference]: Finished difference Result 841 states and 2008 transitions. [2022-03-15 21:30:10,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:30:10,918 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 21 [2022-03-15 21:30:10,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:10,919 INFO L225 Difference]: With dead ends: 841 [2022-03-15 21:30:10,919 INFO L226 Difference]: Without dead ends: 838 [2022-03-15 21:30:10,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:30:10,920 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:10,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-15 21:30:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 643. [2022-03-15 21:30:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.6230529595015577) internal successors, (1684), 642 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1684 transitions. [2022-03-15 21:30:10,926 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1684 transitions. Word has length 21 [2022-03-15 21:30:10,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:10,926 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1684 transitions. [2022-03-15 21:30:10,927 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 21:30:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1684 transitions. [2022-03-15 21:30:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:10,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:10,927 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:10,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-15 21:30:11,127 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 21:30:11,128 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:11,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:11,128 INFO L85 PathProgramCache]: Analyzing trace with hash 438793175, now seen corresponding path program 152 times [2022-03-15 21:30:11,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:11,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423179262] [2022-03-15 21:30:11,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:11,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:11,235 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 21:30:11,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:11,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423179262] [2022-03-15 21:30:11,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423179262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:11,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166110771] [2022-03-15 21:30:11,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:30:11,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:11,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:11,256 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 21:30:11,257 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 21:30:11,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:30:11,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:11,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:11,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:11,527 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 21:30:11,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:11,790 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 21:30:11,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166110771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:11,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:11,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 40 [2022-03-15 21:30:11,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [983671689] [2022-03-15 21:30:11,791 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:11,792 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:11,795 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 35 transitions. [2022-03-15 21:30:11,795 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:11,900 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [169778#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 169776#(or (< (+ i1 1) N1) (<= N1 i1)), 169777#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 169717#(< i1 N1)] [2022-03-15 21:30:11,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:30:11,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:11,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:30:11,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:30:11,901 INFO L87 Difference]: Start difference. First operand 643 states and 1684 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 21:30:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:12,168 INFO L93 Difference]: Finished difference Result 751 states and 1823 transitions. [2022-03-15 21:30:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:30:12,168 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 21 [2022-03-15 21:30:12,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:12,169 INFO L225 Difference]: With dead ends: 751 [2022-03-15 21:30:12,169 INFO L226 Difference]: Without dead ends: 751 [2022-03-15 21:30:12,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=559, Invalid=2411, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:30:12,170 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:12,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-03-15 21:30:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 614. [2022-03-15 21:30:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.6215334420880914) internal successors, (1607), 613 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1607 transitions. [2022-03-15 21:30:12,177 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1607 transitions. Word has length 21 [2022-03-15 21:30:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:12,177 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1607 transitions. [2022-03-15 21:30:12,177 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 21:30:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1607 transitions. [2022-03-15 21:30:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:12,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:12,178 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:12,194 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 21:30:12,378 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 21:30:12,379 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:12,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2049734133, now seen corresponding path program 153 times [2022-03-15 21:30:12,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:12,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331778023] [2022-03-15 21:30:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:12,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:12,495 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 21:30:12,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:12,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331778023] [2022-03-15 21:30:12,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331778023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:12,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112564345] [2022-03-15 21:30:12,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:12,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:12,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:12,496 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 21:30:12,497 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 21:30:12,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:30:12,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:12,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:12,777 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 21:30:12,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:13,046 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 21:30:13,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112564345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:13,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:13,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 41 [2022-03-15 21:30:13,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [817983972] [2022-03-15 21:30:13,047 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:13,048 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:13,051 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:30:13,051 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:13,189 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [171943#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 171945#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 171883#(< i1 N1), 171944#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 171942#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:30:13,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:30:13,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:13,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:30:13,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:30:13,190 INFO L87 Difference]: Start difference. First operand 614 states and 1607 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 21:30:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:13,553 INFO L93 Difference]: Finished difference Result 747 states and 1802 transitions. [2022-03-15 21:30:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:30:13,553 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 21 [2022-03-15 21:30:13,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:13,554 INFO L225 Difference]: With dead ends: 747 [2022-03-15 21:30:13,554 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 21:30:13,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=774, Invalid=3008, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:30:13,555 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:13,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 21:30:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 624. [2022-03-15 21:30:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.6276083467094704) internal successors, (1637), 623 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1637 transitions. [2022-03-15 21:30:13,562 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1637 transitions. Word has length 21 [2022-03-15 21:30:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:13,562 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1637 transitions. [2022-03-15 21:30:13,562 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 21:30:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1637 transitions. [2022-03-15 21:30:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:13,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:13,562 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:13,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-15 21:30:13,763 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 21:30:13,763 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1040797549, now seen corresponding path program 154 times [2022-03-15 21:30:13,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:13,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411920337] [2022-03-15 21:30:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:13,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:13,844 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 21:30:13,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:13,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411920337] [2022-03-15 21:30:13,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411920337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:13,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827211629] [2022-03-15 21:30:13,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:13,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:13,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:13,845 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 21:30:13,846 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 21:30:13,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:13,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:13,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:13,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:14,110 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 21:30:14,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:14,355 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 21:30:14,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827211629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:14,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:14,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 36 [2022-03-15 21:30:14,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1821407064] [2022-03-15 21:30:14,356 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:14,357 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:14,360 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2022-03-15 21:30:14,360 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:14,391 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [174130#(< i1 N1)] [2022-03-15 21:30:14,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:30:14,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:30:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:30:14,392 INFO L87 Difference]: Start difference. First operand 624 states and 1637 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 21:30:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:14,672 INFO L93 Difference]: Finished difference Result 797 states and 1934 transitions. [2022-03-15 21:30:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:30:14,672 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 21 [2022-03-15 21:30:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:14,673 INFO L225 Difference]: With dead ends: 797 [2022-03-15 21:30:14,673 INFO L226 Difference]: Without dead ends: 793 [2022-03-15 21:30:14,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=738, Invalid=2124, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:30:14,674 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:14,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-03-15 21:30:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 622. [2022-03-15 21:30:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.6183574879227054) internal successors, (1626), 621 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1626 transitions. [2022-03-15 21:30:14,681 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1626 transitions. Word has length 21 [2022-03-15 21:30:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:14,681 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1626 transitions. [2022-03-15 21:30:14,681 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 21:30:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1626 transitions. [2022-03-15 21:30:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:14,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:14,682 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:14,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-15 21:30:14,882 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 21:30:14,883 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:14,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1101541398, now seen corresponding path program 155 times [2022-03-15 21:30:14,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:14,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869293575] [2022-03-15 21:30:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:14,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:14,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:14,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869293575] [2022-03-15 21:30:14,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869293575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:14,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658238252] [2022-03-15 21:30:14,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:14,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:14,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:14,977 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 21:30:14,977 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 21:30:15,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:30:15,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:15,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:15,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:15,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658238252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:15,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:15,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 37 [2022-03-15 21:30:15,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [130402016] [2022-03-15 21:30:15,527 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:15,528 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:15,531 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:30:15,532 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:15,738 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [176364#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 176366#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 176363#(or (< (+ i1 1) N1) (<= N1 i1)), 176367#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 176368#(or (<= N1 (+ 5 i1)) (< (+ 6 i1) N1)), 176362#(< i1 N1), 176365#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:30:15,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:30:15,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:15,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:30:15,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1630, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:30:15,739 INFO L87 Difference]: Start difference. First operand 622 states and 1626 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 21:30:16,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:16,748 INFO L93 Difference]: Finished difference Result 905 states and 2058 transitions. [2022-03-15 21:30:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:30:16,748 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 21 [2022-03-15 21:30:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:16,749 INFO L225 Difference]: With dead ends: 905 [2022-03-15 21:30:16,749 INFO L226 Difference]: Without dead ends: 894 [2022-03-15 21:30:16,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1284, Invalid=5036, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:30:16,750 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:16,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 0 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-03-15 21:30:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 637. [2022-03-15 21:30:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.599056603773585) internal successors, (1653), 636 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1653 transitions. [2022-03-15 21:30:16,757 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1653 transitions. Word has length 21 [2022-03-15 21:30:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:16,758 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1653 transitions. [2022-03-15 21:30:16,758 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 21:30:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1653 transitions. [2022-03-15 21:30:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:16,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:16,758 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:16,775 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 21:30:16,959 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 21:30:16,959 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:16,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:16,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1989045079, now seen corresponding path program 156 times [2022-03-15 21:30:16,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:16,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949611439] [2022-03-15 21:30:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:16,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:17,049 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 21:30:17,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:17,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949611439] [2022-03-15 21:30:17,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949611439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:17,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384583912] [2022-03-15 21:30:17,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:30:17,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:17,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:17,051 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 21:30:17,051 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 21:30:17,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:30:17,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:17,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:17,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:17,322 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 21:30:17,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:17,585 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 21:30:17,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384583912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:17,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:17,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 38 [2022-03-15 21:30:17,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [550050098] [2022-03-15 21:30:17,586 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:17,587 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:17,590 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:30:17,590 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:17,626 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [178777#(or (< (+ i1 1) N1) (<= N1 i1)), 178718#(< i1 N1)] [2022-03-15 21:30:17,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:30:17,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:30:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:30:17,627 INFO L87 Difference]: Start difference. First operand 637 states and 1653 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 21:30:17,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:17,850 INFO L93 Difference]: Finished difference Result 828 states and 1957 transitions. [2022-03-15 21:30:17,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:30:17,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 21:30:17,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:17,851 INFO L225 Difference]: With dead ends: 828 [2022-03-15 21:30:17,851 INFO L226 Difference]: Without dead ends: 826 [2022-03-15 21:30:17,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=551, Invalid=2101, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:30:17,852 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:17,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:17,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-03-15 21:30:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 639. [2022-03-15 21:30:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.5987460815047023) internal successors, (1658), 638 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1658 transitions. [2022-03-15 21:30:17,866 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1658 transitions. Word has length 21 [2022-03-15 21:30:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:17,866 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1658 transitions. [2022-03-15 21:30:17,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 21:30:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1658 transitions. [2022-03-15 21:30:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:17,866 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:17,866 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:17,883 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 21:30:18,067 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 21:30:18,067 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1450615563, now seen corresponding path program 157 times [2022-03-15 21:30:18,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:18,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358679449] [2022-03-15 21:30:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:18,165 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 21:30:18,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:18,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358679449] [2022-03-15 21:30:18,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358679449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:18,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567815799] [2022-03-15 21:30:18,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:30:18,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:18,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:18,166 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 21:30:18,167 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 21:30:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:18,438 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 21:30:18,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:18,702 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 21:30:18,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567815799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:18,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:18,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 39 [2022-03-15 21:30:18,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2090749663] [2022-03-15 21:30:18,702 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:18,703 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:18,706 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2022-03-15 21:30:18,706 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:18,772 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [181069#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 181009#(< i1 N1), 181068#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:30:18,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:30:18,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:18,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:30:18,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:30:18,772 INFO L87 Difference]: Start difference. First operand 639 states and 1658 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 21:30:19,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:19,074 INFO L93 Difference]: Finished difference Result 825 states and 1954 transitions. [2022-03-15 21:30:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:30:19,074 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 21 [2022-03-15 21:30:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:19,075 INFO L225 Difference]: With dead ends: 825 [2022-03-15 21:30:19,075 INFO L226 Difference]: Without dead ends: 822 [2022-03-15 21:30:19,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=2565, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:30:19,076 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:19,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-03-15 21:30:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 641. [2022-03-15 21:30:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.5984375) internal successors, (1663), 640 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1663 transitions. [2022-03-15 21:30:19,083 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1663 transitions. Word has length 21 [2022-03-15 21:30:19,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:19,083 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1663 transitions. [2022-03-15 21:30:19,083 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 21:30:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1663 transitions. [2022-03-15 21:30:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:19,084 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:19,084 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:19,100 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 21:30:19,284 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 21:30:19,284 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash -705913065, now seen corresponding path program 158 times [2022-03-15 21:30:19,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:19,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734258403] [2022-03-15 21:30:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:19,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:19,421 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 21:30:19,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:19,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734258403] [2022-03-15 21:30:19,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734258403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:19,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455822280] [2022-03-15 21:30:19,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:30:19,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:19,422 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 21:30:19,423 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 21:30:19,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:30:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:19,695 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 21:30:19,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:19,965 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 21:30:19,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455822280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:19,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:19,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 40 [2022-03-15 21:30:19,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1687580412] [2022-03-15 21:30:19,965 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:19,966 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:19,969 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:30:19,969 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:20,065 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [183368#(or (< (+ i1 1) N1) (<= N1 i1)), 183369#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 183309#(< i1 N1), 183370#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:30:20,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:30:20,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:20,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:30:20,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:30:20,066 INFO L87 Difference]: Start difference. First operand 641 states and 1663 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:20,393 INFO L93 Difference]: Finished difference Result 794 states and 1896 transitions. [2022-03-15 21:30:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:30:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:30:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:20,395 INFO L225 Difference]: With dead ends: 794 [2022-03-15 21:30:20,395 INFO L226 Difference]: Without dead ends: 790 [2022-03-15 21:30:20,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=656, Invalid=2766, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:30:20,395 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:20,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:20,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-03-15 21:30:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 636. [2022-03-15 21:30:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.601574803149606) internal successors, (1652), 635 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1652 transitions. [2022-03-15 21:30:20,403 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1652 transitions. Word has length 21 [2022-03-15 21:30:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:20,403 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1652 transitions. [2022-03-15 21:30:20,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1652 transitions. [2022-03-15 21:30:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:20,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:20,403 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:20,419 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 21:30:20,604 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 21:30:20,604 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:20,604 INFO L85 PathProgramCache]: Analyzing trace with hash 905027893, now seen corresponding path program 159 times [2022-03-15 21:30:20,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:20,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620428594] [2022-03-15 21:30:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:20,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:20,718 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 21:30:20,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:20,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620428594] [2022-03-15 21:30:20,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620428594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:20,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007909799] [2022-03-15 21:30:20,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:20,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:20,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:20,719 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 21:30:20,720 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 21:30:20,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:30:20,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:20,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:20,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:20,994 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 21:30:20,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:21,262 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 21:30:21,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007909799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:21,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:21,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 41 [2022-03-15 21:30:21,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1030053825] [2022-03-15 21:30:21,263 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:21,264 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:21,267 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 35 transitions. [2022-03-15 21:30:21,267 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:21,396 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [185570#(< i1 N1), 185631#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 185630#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 185629#(or (< (+ i1 1) N1) (<= N1 i1)), 185632#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1))] [2022-03-15 21:30:21,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:30:21,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:21,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:30:21,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1738, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:30:21,397 INFO L87 Difference]: Start difference. First operand 636 states and 1652 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:21,672 INFO L93 Difference]: Finished difference Result 716 states and 1749 transitions. [2022-03-15 21:30:21,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:30:21,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:30:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:21,673 INFO L225 Difference]: With dead ends: 716 [2022-03-15 21:30:21,673 INFO L226 Difference]: Without dead ends: 716 [2022-03-15 21:30:21,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=624, Invalid=2682, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:30:21,673 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:21,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-15 21:30:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 608. [2022-03-15 21:30:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 2.624382207578254) internal successors, (1593), 607 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1593 transitions. [2022-03-15 21:30:21,681 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1593 transitions. Word has length 21 [2022-03-15 21:30:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:21,681 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1593 transitions. [2022-03-15 21:30:21,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1593 transitions. [2022-03-15 21:30:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:21,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:21,682 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:21,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-15 21:30:21,890 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 21:30:21,890 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:21,890 INFO L85 PathProgramCache]: Analyzing trace with hash -695409961, now seen corresponding path program 160 times [2022-03-15 21:30:21,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:21,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320290490] [2022-03-15 21:30:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:21,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:22,014 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 21:30:22,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:22,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320290490] [2022-03-15 21:30:22,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320290490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:22,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067679070] [2022-03-15 21:30:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:22,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:22,016 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 21:30:22,016 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 21:30:22,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:22,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:22,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:22,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:22,293 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 21:30:22,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:22,566 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 21:30:22,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067679070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:22,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:22,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2022-03-15 21:30:22,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1300614072] [2022-03-15 21:30:22,566 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:22,567 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:22,570 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:30:22,571 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:22,732 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [187693#(< i1 N1), 187756#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 187752#(or (< (+ i1 1) N1) (<= N1 i1)), 187753#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 187755#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 187754#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:30:22,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:30:22,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:22,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:30:22,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:30:22,733 INFO L87 Difference]: Start difference. First operand 608 states and 1593 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 21:30:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:23,119 INFO L93 Difference]: Finished difference Result 706 states and 1723 transitions. [2022-03-15 21:30:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:30:23,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 21:30:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:23,121 INFO L225 Difference]: With dead ends: 706 [2022-03-15 21:30:23,121 INFO L226 Difference]: Without dead ends: 706 [2022-03-15 21:30:23,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=890, Invalid=3400, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:30:23,121 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 119 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:23,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 0 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-15 21:30:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 596. [2022-03-15 21:30:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.6134453781512605) internal successors, (1555), 595 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1555 transitions. [2022-03-15 21:30:23,128 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1555 transitions. Word has length 21 [2022-03-15 21:30:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:23,128 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1555 transitions. [2022-03-15 21:30:23,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 21:30:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1555 transitions. [2022-03-15 21:30:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:23,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:23,129 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:23,145 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 21:30:23,329 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 21:30:23,330 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash -243495115, now seen corresponding path program 161 times [2022-03-15 21:30:23,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:23,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122021397] [2022-03-15 21:30:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:23,462 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 21:30:23,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:23,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122021397] [2022-03-15 21:30:23,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122021397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:23,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449001928] [2022-03-15 21:30:23,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:23,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:23,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:23,466 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 21:30:23,467 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 21:30:23,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:30:23,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:23,754 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 21:30:23,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:23,916 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 21:30:23,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449001928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:23,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:23,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 21:30:23,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2048549011] [2022-03-15 21:30:23,916 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:23,917 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:23,921 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 49 transitions. [2022-03-15 21:30:23,921 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:24,125 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [189852#(or (<= N2 (+ 3 i2)) (< i1 N1)), 189850#(or (<= N2 (+ i2 1)) (< i1 N1)), 189848#(< i1 N1), 189853#(or (< i1 N1) (<= N2 (+ i2 4))), 189851#(or (< i1 N1) (<= N2 (+ 2 i2))), 189849#(or (<= N2 i2) (< i1 N1))] [2022-03-15 21:30:24,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:30:24,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:24,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:30:24,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=1348, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:30:24,126 INFO L87 Difference]: Start difference. First operand 596 states and 1555 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:24,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:24,411 INFO L93 Difference]: Finished difference Result 735 states and 1764 transitions. [2022-03-15 21:30:24,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:30:24,411 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:30:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:24,412 INFO L225 Difference]: With dead ends: 735 [2022-03-15 21:30:24,412 INFO L226 Difference]: Without dead ends: 723 [2022-03-15 21:30:24,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:30:24,413 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:24,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:24,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-03-15 21:30:24,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 545. [2022-03-15 21:30:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.6341911764705883) internal successors, (1433), 544 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1433 transitions. [2022-03-15 21:30:24,422 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1433 transitions. Word has length 21 [2022-03-15 21:30:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:24,422 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1433 transitions. [2022-03-15 21:30:24,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1433 transitions. [2022-03-15 21:30:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:24,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:24,423 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:24,447 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 21:30:24,646 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 21:30:24,646 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:24,647 INFO L85 PathProgramCache]: Analyzing trace with hash -561205204, now seen corresponding path program 162 times [2022-03-15 21:30:24,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:24,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111060238] [2022-03-15 21:30:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:24,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:24,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:24,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111060238] [2022-03-15 21:30:24,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111060238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:24,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116598002] [2022-03-15 21:30:24,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:30:24,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:24,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:24,766 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 21:30:24,767 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 21:30:24,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:30:24,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:24,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:24,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:25,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:25,216 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 21:30:25,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116598002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:25,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:25,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 21:30:25,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1191640756] [2022-03-15 21:30:25,217 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:25,218 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:25,222 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 45 transitions. [2022-03-15 21:30:25,222 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:25,462 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [191863#(< i1 N1), 191864#(or (< i2 N2) (< i1 N1)), 191867#(or (<= (+ i2 4) N2) (< i1 N1)), 191866#(or (< i1 N1) (<= (+ 3 i2) N2)), 191868#(or (< i1 N1) (<= (+ 5 i2) N2)), 191865#(or (< i1 N1) (<= (+ 2 i2) N2))] [2022-03-15 21:30:25,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:30:25,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:30:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:30:25,463 INFO L87 Difference]: Start difference. First operand 545 states and 1433 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:25,716 INFO L93 Difference]: Finished difference Result 685 states and 1635 transitions. [2022-03-15 21:30:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:30:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:30:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:25,717 INFO L225 Difference]: With dead ends: 685 [2022-03-15 21:30:25,717 INFO L226 Difference]: Without dead ends: 663 [2022-03-15 21:30:25,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:30:25,718 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:25,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-03-15 21:30:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 539. [2022-03-15 21:30:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.604089219330855) internal successors, (1401), 538 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1401 transitions. [2022-03-15 21:30:25,724 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1401 transitions. Word has length 21 [2022-03-15 21:30:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:25,724 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1401 transitions. [2022-03-15 21:30:25,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1401 transitions. [2022-03-15 21:30:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:25,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:25,724 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:25,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-03-15 21:30:25,925 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 21:30:25,925 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash 792104493, now seen corresponding path program 163 times [2022-03-15 21:30:25,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:25,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482844934] [2022-03-15 21:30:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:25,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:26,035 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 21:30:26,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:26,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482844934] [2022-03-15 21:30:26,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482844934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:26,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804121201] [2022-03-15 21:30:26,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:30:26,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:26,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:26,037 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 21:30:26,037 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 21:30:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:26,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:26,320 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 21:30:26,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:26,498 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 21:30:26,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804121201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:26,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:26,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-03-15 21:30:26,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [170681073] [2022-03-15 21:30:26,499 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:26,500 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:26,505 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 45 transitions. [2022-03-15 21:30:26,506 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:26,715 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [193812#(or (<= N2 i2) (< i1 N1)), 193811#(< i1 N1), 193814#(or (< i1 N1) (<= N2 (+ 2 i2))), 193815#(or (<= N2 (+ 3 i2)) (< i1 N1)), 193813#(or (<= N2 (+ i2 1)) (< i1 N1))] [2022-03-15 21:30:26,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:30:26,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:26,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:30:26,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=1288, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:30:26,716 INFO L87 Difference]: Start difference. First operand 539 states and 1401 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 21:30:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:27,002 INFO L93 Difference]: Finished difference Result 676 states and 1617 transitions. [2022-03-15 21:30:27,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:30:27,002 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 21 [2022-03-15 21:30:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:27,003 INFO L225 Difference]: With dead ends: 676 [2022-03-15 21:30:27,003 INFO L226 Difference]: Without dead ends: 666 [2022-03-15 21:30:27,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=808, Invalid=2272, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:30:27,003 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:27,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:27,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-03-15 21:30:27,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 496. [2022-03-15 21:30:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 2.618181818181818) internal successors, (1296), 495 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1296 transitions. [2022-03-15 21:30:27,010 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1296 transitions. Word has length 21 [2022-03-15 21:30:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:27,010 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1296 transitions. [2022-03-15 21:30:27,010 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 21:30:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1296 transitions. [2022-03-15 21:30:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:27,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:27,011 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:27,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-15 21:30:27,211 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 21:30:27,211 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:27,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1850543530, now seen corresponding path program 164 times [2022-03-15 21:30:27,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:27,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634900257] [2022-03-15 21:30:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:27,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:27,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:27,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634900257] [2022-03-15 21:30:27,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634900257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:27,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686104811] [2022-03-15 21:30:27,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:30:27,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:27,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:27,326 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 21:30:27,326 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 21:30:27,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:30:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:27,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:27,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:27,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:27,788 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 21:30:27,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686104811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:27,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:27,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-03-15 21:30:27,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [56172821] [2022-03-15 21:30:27,788 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:27,789 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:27,793 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 41 transitions. [2022-03-15 21:30:27,793 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:27,967 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [195670#(< i1 N1), 195672#(or (< i1 N1) (<= (+ 2 i2) N2)), 195674#(or (<= (+ i2 4) N2) (< i1 N1)), 195673#(or (< i1 N1) (<= (+ 3 i2) N2)), 195671#(or (< i2 N2) (< i1 N1))] [2022-03-15 21:30:27,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:30:27,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:30:27,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:30:27,968 INFO L87 Difference]: Start difference. First operand 496 states and 1296 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 21:30:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:28,178 INFO L93 Difference]: Finished difference Result 666 states and 1547 transitions. [2022-03-15 21:30:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:30:28,178 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 21 [2022-03-15 21:30:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:28,179 INFO L225 Difference]: With dead ends: 666 [2022-03-15 21:30:28,179 INFO L226 Difference]: Without dead ends: 650 [2022-03-15 21:30:28,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=557, Invalid=2095, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:30:28,180 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:28,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-15 21:30:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 492. [2022-03-15 21:30:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.5926680244399187) internal successors, (1273), 491 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1273 transitions. [2022-03-15 21:30:28,186 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1273 transitions. Word has length 21 [2022-03-15 21:30:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:28,186 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1273 transitions. [2022-03-15 21:30:28,186 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 21:30:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1273 transitions. [2022-03-15 21:30:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:28,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:28,187 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:28,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-15 21:30:28,387 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 21:30:28,387 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:28,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1933889589, now seen corresponding path program 165 times [2022-03-15 21:30:28,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:28,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302818201] [2022-03-15 21:30:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:28,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:28,475 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 21:30:28,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:28,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302818201] [2022-03-15 21:30:28,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302818201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:28,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702637834] [2022-03-15 21:30:28,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:28,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:28,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:28,477 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 21:30:28,477 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 21:30:28,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:30:28,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:28,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:28,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:28,765 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 21:30:28,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:28,960 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 21:30:28,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702637834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:28,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:28,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 36 [2022-03-15 21:30:28,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1994192145] [2022-03-15 21:30:28,960 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:28,961 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:28,965 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 41 transitions. [2022-03-15 21:30:28,965 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:29,092 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [197503#(or (< i1 N1) (<= N2 (+ 2 i2))), 197502#(or (<= N2 (+ i2 1)) (< i1 N1)), 197501#(or (<= N2 i2) (< i1 N1)), 197500#(< i1 N1)] [2022-03-15 21:30:29,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:30:29,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:29,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:30:29,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1228, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:30:29,093 INFO L87 Difference]: Start difference. First operand 492 states and 1273 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 21:30:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:29,355 INFO L93 Difference]: Finished difference Result 621 states and 1480 transitions. [2022-03-15 21:30:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:30:29,356 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 21:30:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:29,356 INFO L225 Difference]: With dead ends: 621 [2022-03-15 21:30:29,356 INFO L226 Difference]: Without dead ends: 613 [2022-03-15 21:30:29,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=809, Invalid=2271, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:30:29,357 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:29,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-03-15 21:30:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 457. [2022-03-15 21:30:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 2.598684210526316) internal successors, (1185), 456 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1185 transitions. [2022-03-15 21:30:29,363 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1185 transitions. Word has length 21 [2022-03-15 21:30:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:29,363 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1185 transitions. [2022-03-15 21:30:29,363 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 21:30:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1185 transitions. [2022-03-15 21:30:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:29,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:29,363 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:29,379 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 21:30:29,564 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 21:30:29,564 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:29,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:29,564 INFO L85 PathProgramCache]: Analyzing trace with hash -922303764, now seen corresponding path program 166 times [2022-03-15 21:30:29,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:29,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495995335] [2022-03-15 21:30:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:29,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:29,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:29,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495995335] [2022-03-15 21:30:29,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495995335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:29,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362391650] [2022-03-15 21:30:29,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:29,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:29,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:29,666 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 21:30:29,667 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 21:30:29,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:29,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:29,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:29,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:29,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:30,155 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 21:30:30,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362391650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:30,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:30,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 37 [2022-03-15 21:30:30,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [785341807] [2022-03-15 21:30:30,156 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:30,157 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:30,160 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:30:30,160 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:30,295 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [199229#(or (< i1 N1) (<= (+ 2 i2) N2)), 199227#(< i1 N1), 199228#(or (< i2 N2) (< i1 N1)), 199230#(or (< i1 N1) (<= (+ 3 i2) N2))] [2022-03-15 21:30:30,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:30:30,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:30:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:30:30,296 INFO L87 Difference]: Start difference. First operand 457 states and 1185 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:30,472 INFO L93 Difference]: Finished difference Result 655 states and 1485 transitions. [2022-03-15 21:30:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:30:30,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:30:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:30,474 INFO L225 Difference]: With dead ends: 655 [2022-03-15 21:30:30,474 INFO L226 Difference]: Without dead ends: 645 [2022-03-15 21:30:30,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=499, Invalid=1853, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:30:30,478 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:30,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-03-15 21:30:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 455. [2022-03-15 21:30:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.579295154185022) internal successors, (1171), 454 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1171 transitions. [2022-03-15 21:30:30,484 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1171 transitions. Word has length 21 [2022-03-15 21:30:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:30,484 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1171 transitions. [2022-03-15 21:30:30,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1171 transitions. [2022-03-15 21:30:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:30,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:30,485 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:30,508 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 21:30:30,698 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 21:30:30,698 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash 585248045, now seen corresponding path program 167 times [2022-03-15 21:30:30,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:30,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240238792] [2022-03-15 21:30:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:30,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:30,786 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 21:30:30,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:30,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240238792] [2022-03-15 21:30:30,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240238792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:30,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436272455] [2022-03-15 21:30:30,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:30,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:30,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:30,787 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 21:30:30,788 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 21:30:30,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:30:30,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:30,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:31,061 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 21:30:31,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:31,267 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 21:30:31,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436272455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:31,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:31,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 36 [2022-03-15 21:30:31,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1849574454] [2022-03-15 21:30:31,267 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:31,268 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:31,272 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:30:31,272 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:31,365 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [200969#(or (<= N2 (+ i2 1)) (< i1 N1)), 200967#(< i1 N1), 200968#(or (<= N2 i2) (< i1 N1))] [2022-03-15 21:30:31,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:30:31,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:31,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:30:31,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:30:31,366 INFO L87 Difference]: Start difference. First operand 455 states and 1171 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 21:30:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:31,627 INFO L93 Difference]: Finished difference Result 566 states and 1344 transitions. [2022-03-15 21:30:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:30:31,627 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 21 [2022-03-15 21:30:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:31,628 INFO L225 Difference]: With dead ends: 566 [2022-03-15 21:30:31,628 INFO L226 Difference]: Without dead ends: 560 [2022-03-15 21:30:31,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:30:31,629 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:31,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-03-15 21:30:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 445. [2022-03-15 21:30:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.5923423423423424) internal successors, (1151), 444 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1151 transitions. [2022-03-15 21:30:31,635 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1151 transitions. Word has length 21 [2022-03-15 21:30:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:31,635 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1151 transitions. [2022-03-15 21:30:31,635 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 21:30:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1151 transitions. [2022-03-15 21:30:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:31,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:31,636 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:31,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-15 21:30:31,836 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 21:30:31,836 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:31,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1169455210, now seen corresponding path program 168 times [2022-03-15 21:30:31,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:31,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349950092] [2022-03-15 21:30:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:31,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:31,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:31,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349950092] [2022-03-15 21:30:31,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349950092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:31,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040000340] [2022-03-15 21:30:31,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:30:31,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:31,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:31,940 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 21:30:31,940 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 21:30:31,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:30:31,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:31,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:32,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:32,464 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 21:30:32,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040000340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:32,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:32,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 37 [2022-03-15 21:30:32,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [337584756] [2022-03-15 21:30:32,465 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:32,466 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:32,469 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:30:32,469 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:32,561 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [202617#(or (< i2 N2) (< i1 N1)), 202618#(or (< i1 N1) (<= (+ 2 i2) N2)), 202616#(< i1 N1)] [2022-03-15 21:30:32,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:30:32,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:32,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:30:32,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1311, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:30:32,562 INFO L87 Difference]: Start difference. First operand 445 states and 1151 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 21:30:32,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:32,699 INFO L93 Difference]: Finished difference Result 667 states and 1496 transitions. [2022-03-15 21:30:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:30:32,699 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 21:30:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:32,700 INFO L225 Difference]: With dead ends: 667 [2022-03-15 21:30:32,700 INFO L226 Difference]: Without dead ends: 663 [2022-03-15 21:30:32,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1621, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:30:32,700 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:32,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:32,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-03-15 21:30:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 445. [2022-03-15 21:30:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.581081081081081) internal successors, (1146), 444 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1146 transitions. [2022-03-15 21:30:32,706 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1146 transitions. Word has length 21 [2022-03-15 21:30:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:32,706 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1146 transitions. [2022-03-15 21:30:32,706 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 21:30:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1146 transitions. [2022-03-15 21:30:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:32,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:32,706 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:32,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-15 21:30:32,907 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 21:30:32,907 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1675013835, now seen corresponding path program 169 times [2022-03-15 21:30:32,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:32,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308605696] [2022-03-15 21:30:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:32,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:33,006 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 21:30:33,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:33,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308605696] [2022-03-15 21:30:33,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308605696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:33,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98751388] [2022-03-15 21:30:33,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:30:33,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:33,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:33,008 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 21:30:33,035 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 21:30:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:33,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:33,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:33,338 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 21:30:33,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:33,611 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 21:30:33,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98751388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:33,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:33,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 36 [2022-03-15 21:30:33,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1344250521] [2022-03-15 21:30:33,612 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:33,613 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:33,617 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:30:33,618 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:33,690 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [204344#(or (<= N2 i2) (< i1 N1)), 204343#(< i1 N1)] [2022-03-15 21:30:33,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:30:33,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:30:33,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:30:33,691 INFO L87 Difference]: Start difference. First operand 445 states and 1146 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 21:30:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:33,984 INFO L93 Difference]: Finished difference Result 538 states and 1286 transitions. [2022-03-15 21:30:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:30:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 21:30:33,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:33,985 INFO L225 Difference]: With dead ends: 538 [2022-03-15 21:30:33,985 INFO L226 Difference]: Without dead ends: 534 [2022-03-15 21:30:33,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=802, Invalid=2278, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:30:33,985 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:33,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:33,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-03-15 21:30:33,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 441. [2022-03-15 21:30:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.5863636363636364) internal successors, (1138), 440 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1138 transitions. [2022-03-15 21:30:33,994 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1138 transitions. Word has length 21 [2022-03-15 21:30:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:33,994 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1138 transitions. [2022-03-15 21:30:33,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 21:30:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1138 transitions. [2022-03-15 21:30:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:33,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:33,995 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:34,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:34,218 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 21:30:34,218 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:34,218 INFO L85 PathProgramCache]: Analyzing trace with hash 208045484, now seen corresponding path program 170 times [2022-03-15 21:30:34,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:34,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283769997] [2022-03-15 21:30:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:34,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:34,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:34,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283769997] [2022-03-15 21:30:34,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283769997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:34,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674371190] [2022-03-15 21:30:34,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:30:34,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:34,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:34,315 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 21:30:34,316 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 21:30:34,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:30:34,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:34,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:34,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:34,867 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 21:30:34,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674371190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:34,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:34,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 37 [2022-03-15 21:30:34,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [106130133] [2022-03-15 21:30:34,868 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:34,869 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:34,872 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:30:34,872 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:34,925 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [205958#(or (< i2 N2) (< i1 N1)), 205957#(< i1 N1)] [2022-03-15 21:30:34,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:30:34,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:30:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1225, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:30:34,926 INFO L87 Difference]: Start difference. First operand 441 states and 1138 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:35,039 INFO L93 Difference]: Finished difference Result 658 states and 1478 transitions. [2022-03-15 21:30:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:30:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:30:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:35,040 INFO L225 Difference]: With dead ends: 658 [2022-03-15 21:30:35,040 INFO L226 Difference]: Without dead ends: 658 [2022-03-15 21:30:35,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:30:35,041 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:35,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:35,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-15 21:30:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 445. [2022-03-15 21:30:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.59009009009009) internal successors, (1150), 444 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1150 transitions. [2022-03-15 21:30:35,048 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1150 transitions. Word has length 21 [2022-03-15 21:30:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:35,048 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1150 transitions. [2022-03-15 21:30:35,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1150 transitions. [2022-03-15 21:30:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:35,049 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:35,049 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:35,066 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 21:30:35,255 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 21:30:35,255 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:35,256 INFO L85 PathProgramCache]: Analyzing trace with hash -85357523, now seen corresponding path program 171 times [2022-03-15 21:30:35,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:35,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497683352] [2022-03-15 21:30:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:35,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:35,341 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 21:30:35,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:35,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497683352] [2022-03-15 21:30:35,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497683352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:35,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888189399] [2022-03-15 21:30:35,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:35,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:35,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:35,342 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 21:30:35,343 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 21:30:35,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:30:35,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:35,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:35,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:35,617 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 21:30:35,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:35,871 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 21:30:35,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888189399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:35,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:35,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 36 [2022-03-15 21:30:35,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [123831898] [2022-03-15 21:30:35,872 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:35,873 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:35,876 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:30:35,876 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:35,900 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [207670#(< i1 N1)] [2022-03-15 21:30:35,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:30:35,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:35,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:30:35,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1048, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:30:35,901 INFO L87 Difference]: Start difference. First operand 445 states and 1150 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 21:30:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:36,192 INFO L93 Difference]: Finished difference Result 521 states and 1285 transitions. [2022-03-15 21:30:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:30:36,192 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 21:30:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:36,193 INFO L225 Difference]: With dead ends: 521 [2022-03-15 21:30:36,193 INFO L226 Difference]: Without dead ends: 519 [2022-03-15 21:30:36,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:30:36,194 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:36,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-15 21:30:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 456. [2022-03-15 21:30:36,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.608791208791209) internal successors, (1187), 455 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1187 transitions. [2022-03-15 21:30:36,199 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1187 transitions. Word has length 21 [2022-03-15 21:30:36,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:36,199 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1187 transitions. [2022-03-15 21:30:36,199 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 21:30:36,199 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1187 transitions. [2022-03-15 21:30:36,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:36,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:36,200 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:36,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-15 21:30:36,403 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 21:30:36,403 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash -24613674, now seen corresponding path program 172 times [2022-03-15 21:30:36,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:36,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549914281] [2022-03-15 21:30:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:36,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:36,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:36,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549914281] [2022-03-15 21:30:36,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549914281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:36,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647393456] [2022-03-15 21:30:36,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:36,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:36,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:36,499 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 21:30:36,499 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 21:30:36,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:36,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:36,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:36,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:36,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:37,072 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 21:30:37,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647393456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:37,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:37,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 37 [2022-03-15 21:30:37,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [29182495] [2022-03-15 21:30:37,073 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:37,074 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:37,077 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:30:37,077 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:37,293 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [209299#(or (< (+ i1 1) N1) (<= N1 i1)), 209304#(or (<= N1 (+ 5 i1)) (< (+ 6 i1) N1)), 209298#(< i1 N1), 209301#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 209302#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 209300#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 209305#(or (< (+ 7 i1) N1) (<= N1 (+ 6 i1))), 209303#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1))] [2022-03-15 21:30:37,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:30:37,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:30:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1707, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:30:37,294 INFO L87 Difference]: Start difference. First operand 456 states and 1187 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:38,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:38,619 INFO L93 Difference]: Finished difference Result 755 states and 1655 transitions. [2022-03-15 21:30:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 21:30:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:30:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:38,620 INFO L225 Difference]: With dead ends: 755 [2022-03-15 21:30:38,620 INFO L226 Difference]: Without dead ends: 755 [2022-03-15 21:30:38,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1685, Invalid=6325, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 21:30:38,621 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 174 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:38,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 0 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:30:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-15 21:30:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 482. [2022-03-15 21:30:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.584199584199584) internal successors, (1243), 481 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1243 transitions. [2022-03-15 21:30:38,627 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1243 transitions. Word has length 21 [2022-03-15 21:30:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:38,627 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1243 transitions. [2022-03-15 21:30:38,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1243 transitions. [2022-03-15 21:30:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:38,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:38,628 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:38,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-03-15 21:30:38,828 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 21:30:38,828 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:38,829 INFO L85 PathProgramCache]: Analyzing trace with hash 862890007, now seen corresponding path program 173 times [2022-03-15 21:30:38,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:38,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936379199] [2022-03-15 21:30:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:38,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:38,923 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 21:30:38,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:38,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936379199] [2022-03-15 21:30:38,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936379199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:38,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048893563] [2022-03-15 21:30:38,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:38,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:38,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:38,925 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 21:30:38,925 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 21:30:38,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:30:38,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:38,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:38,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:39,198 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 21:30:39,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:39,465 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 21:30:39,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048893563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:39,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:39,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 38 [2022-03-15 21:30:39,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [633814548] [2022-03-15 21:30:39,466 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:39,467 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:39,470 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 27 transitions. [2022-03-15 21:30:39,470 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:39,501 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [211272#(or (< (+ i1 1) N1) (<= N1 i1)), 211213#(< i1 N1)] [2022-03-15 21:30:39,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:30:39,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:30:39,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:30:39,502 INFO L87 Difference]: Start difference. First operand 482 states and 1243 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 21:30:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:39,719 INFO L93 Difference]: Finished difference Result 593 states and 1410 transitions. [2022-03-15 21:30:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:30:39,719 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 21 [2022-03-15 21:30:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:39,720 INFO L225 Difference]: With dead ends: 593 [2022-03-15 21:30:39,720 INFO L226 Difference]: Without dead ends: 593 [2022-03-15 21:30:39,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=559, Invalid=2093, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:30:39,720 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:39,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-03-15 21:30:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 482. [2022-03-15 21:30:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.584199584199584) internal successors, (1243), 481 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1243 transitions. [2022-03-15 21:30:39,729 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1243 transitions. Word has length 21 [2022-03-15 21:30:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:39,729 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1243 transitions. [2022-03-15 21:30:39,729 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 21:30:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1243 transitions. [2022-03-15 21:30:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:39,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:39,730 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:39,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-15 21:30:39,954 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 21:30:39,955 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:39,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1718196661, now seen corresponding path program 174 times [2022-03-15 21:30:39,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:39,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777224263] [2022-03-15 21:30:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:39,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:40,058 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 21:30:40,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:40,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777224263] [2022-03-15 21:30:40,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777224263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:40,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255380247] [2022-03-15 21:30:40,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:30:40,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:40,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:40,059 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 21:30:40,060 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 21:30:40,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:30:40,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:40,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:40,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:40,336 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 21:30:40,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:40,603 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 21:30:40,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255380247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:40,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:40,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 39 [2022-03-15 21:30:40,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1988874070] [2022-03-15 21:30:40,604 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:40,605 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:40,608 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:30:40,608 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:40,667 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [213014#(or (< (+ i1 1) N1) (<= N1 i1)), 212955#(< i1 N1), 213015#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:30:40,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:30:40,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:30:40,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:30:40,668 INFO L87 Difference]: Start difference. First operand 482 states and 1243 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 21:30:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:40,940 INFO L93 Difference]: Finished difference Result 604 states and 1426 transitions. [2022-03-15 21:30:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:30:40,940 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 21 [2022-03-15 21:30:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:40,941 INFO L225 Difference]: With dead ends: 604 [2022-03-15 21:30:40,941 INFO L226 Difference]: Without dead ends: 604 [2022-03-15 21:30:40,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=2565, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:30:40,942 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:40,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-15 21:30:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 482. [2022-03-15 21:30:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.584199584199584) internal successors, (1243), 481 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1243 transitions. [2022-03-15 21:30:40,948 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1243 transitions. Word has length 21 [2022-03-15 21:30:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:40,948 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1243 transitions. [2022-03-15 21:30:40,948 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 21:30:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1243 transitions. [2022-03-15 21:30:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:40,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:40,948 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:40,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-15 21:30:41,149 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 21:30:41,149 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:41,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1832068137, now seen corresponding path program 175 times [2022-03-15 21:30:41,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:41,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31175958] [2022-03-15 21:30:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:41,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:41,263 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 21:30:41,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:41,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31175958] [2022-03-15 21:30:41,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31175958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:41,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652492109] [2022-03-15 21:30:41,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:30:41,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:41,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:41,265 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 21:30:41,265 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 21:30:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:41,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:41,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:41,544 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 21:30:41,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:41,816 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 21:30:41,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652492109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:41,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:41,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 40 [2022-03-15 21:30:41,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [830650315] [2022-03-15 21:30:41,816 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:41,817 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:41,820 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2022-03-15 21:30:41,820 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:41,910 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [214716#(< i1 N1), 214775#(or (< (+ i1 1) N1) (<= N1 i1)), 214777#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 214776#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:30:41,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:30:41,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:30:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:30:41,911 INFO L87 Difference]: Start difference. First operand 482 states and 1243 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 21:30:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:42,208 INFO L93 Difference]: Finished difference Result 604 states and 1421 transitions. [2022-03-15 21:30:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:30:42,209 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 21 [2022-03-15 21:30:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:42,210 INFO L225 Difference]: With dead ends: 604 [2022-03-15 21:30:42,210 INFO L226 Difference]: Without dead ends: 604 [2022-03-15 21:30:42,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=643, Invalid=2779, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:30:42,210 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:42,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-15 21:30:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 482. [2022-03-15 21:30:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.584199584199584) internal successors, (1243), 481 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1243 transitions. [2022-03-15 21:30:42,216 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1243 transitions. Word has length 21 [2022-03-15 21:30:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:42,216 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1243 transitions. [2022-03-15 21:30:42,216 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 21:30:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1243 transitions. [2022-03-15 21:30:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:42,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:42,217 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:42,233 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 21:30:42,417 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 21:30:42,417 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash -221127179, now seen corresponding path program 176 times [2022-03-15 21:30:42,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:42,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554334358] [2022-03-15 21:30:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:42,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:42,538 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 21:30:42,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:42,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554334358] [2022-03-15 21:30:42,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554334358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:42,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216786837] [2022-03-15 21:30:42,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:30:42,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:42,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:42,540 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 21:30:42,540 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 21:30:42,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:30:42,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:42,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:42,817 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 21:30:42,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:43,085 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 21:30:43,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216786837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:43,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:43,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 41 [2022-03-15 21:30:43,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1416538401] [2022-03-15 21:30:43,086 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:43,087 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:43,090 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:30:43,090 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:43,224 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [216539#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 216540#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 216479#(< i1 N1), 216541#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 216538#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:30:43,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:30:43,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:43,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:30:43,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:30:43,225 INFO L87 Difference]: Start difference. First operand 482 states and 1243 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 21:30:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:43,525 INFO L93 Difference]: Finished difference Result 593 states and 1398 transitions. [2022-03-15 21:30:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:30:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 21:30:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:43,527 INFO L225 Difference]: With dead ends: 593 [2022-03-15 21:30:43,527 INFO L226 Difference]: Without dead ends: 593 [2022-03-15 21:30:43,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=2810, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:30:43,527 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:43,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-03-15 21:30:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 482. [2022-03-15 21:30:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.584199584199584) internal successors, (1243), 481 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1243 transitions. [2022-03-15 21:30:43,532 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1243 transitions. Word has length 21 [2022-03-15 21:30:43,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:43,533 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1243 transitions. [2022-03-15 21:30:43,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 21:30:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1243 transitions. [2022-03-15 21:30:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:43,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:43,533 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:43,549 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 21:30:43,733 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 21:30:43,734 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:43,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:43,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1821565033, now seen corresponding path program 177 times [2022-03-15 21:30:43,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:43,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530187409] [2022-03-15 21:30:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:43,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:43,870 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 21:30:43,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:43,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530187409] [2022-03-15 21:30:43,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530187409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:43,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146941070] [2022-03-15 21:30:43,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:43,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:43,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:43,872 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 21:30:43,872 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 21:30:43,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:30:43,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:43,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:44,150 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 21:30:44,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:44,421 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 21:30:44,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146941070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:44,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:44,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2022-03-15 21:30:44,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [219948462] [2022-03-15 21:30:44,421 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:44,422 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:44,425 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 35 transitions. [2022-03-15 21:30:44,425 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:44,581 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [218291#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 218289#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 218290#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 218288#(or (< (+ i1 1) N1) (<= N1 i1)), 218292#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 218229#(< i1 N1)] [2022-03-15 21:30:44,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:30:44,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:44,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:30:44,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1896, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:30:44,582 INFO L87 Difference]: Start difference. First operand 482 states and 1243 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 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 21:30:44,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:44,799 INFO L93 Difference]: Finished difference Result 535 states and 1295 transitions. [2022-03-15 21:30:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:30:44,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 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 21:30:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:44,800 INFO L225 Difference]: With dead ends: 535 [2022-03-15 21:30:44,800 INFO L226 Difference]: Without dead ends: 535 [2022-03-15 21:30:44,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=2557, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:30:44,801 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:44,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-03-15 21:30:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 455. [2022-03-15 21:30:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.6211453744493394) internal successors, (1190), 454 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1190 transitions. [2022-03-15 21:30:44,806 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1190 transitions. Word has length 21 [2022-03-15 21:30:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:44,806 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1190 transitions. [2022-03-15 21:30:44,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 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 21:30:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1190 transitions. [2022-03-15 21:30:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:30:44,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:44,807 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:44,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-15 21:30:45,008 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 21:30:45,008 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:45,008 INFO L85 PathProgramCache]: Analyzing trace with hash 104469045, now seen corresponding path program 178 times [2022-03-15 21:30:45,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:45,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405798453] [2022-03-15 21:30:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:45,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:45,149 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 21:30:45,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:45,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405798453] [2022-03-15 21:30:45,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405798453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:45,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690025057] [2022-03-15 21:30:45,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:45,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:45,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:45,150 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 21:30:45,151 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 21:30:45,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:45,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:45,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:30:45,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:45,439 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 21:30:45,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:45,710 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 21:30:45,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690025057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:45,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:45,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2022-03-15 21:30:45,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1354410525] [2022-03-15 21:30:45,711 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:45,712 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:45,715 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:30:45,715 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:45,903 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [219918#(or (< (+ i1 1) N1) (<= N1 i1)), 219923#(or (<= N1 (+ 5 i1)) (< (+ 6 i1) N1)), 219920#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 219919#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 219859#(< i1 N1), 219921#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 219922#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1))] [2022-03-15 21:30:45,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:30:45,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:45,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:30:45,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=2031, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:30:45,904 INFO L87 Difference]: Start difference. First operand 455 states and 1190 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 21:30:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:46,259 INFO L93 Difference]: Finished difference Result 516 states and 1266 transitions. [2022-03-15 21:30:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:30:46,259 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 21:30:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:46,260 INFO L225 Difference]: With dead ends: 516 [2022-03-15 21:30:46,260 INFO L226 Difference]: Without dead ends: 516 [2022-03-15 21:30:46,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:30:46,261 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:46,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-03-15 21:30:46,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 462. [2022-03-15 21:30:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.6268980477223427) internal successors, (1211), 461 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:46,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1211 transitions. [2022-03-15 21:30:46,267 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1211 transitions. Word has length 21 [2022-03-15 21:30:46,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:46,267 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1211 transitions. [2022-03-15 21:30:46,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 21:30:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1211 transitions. [2022-03-15 21:30:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:30:46,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:46,268 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:46,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:46,469 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 21:30:46,470 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:46,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1886034841, now seen corresponding path program 179 times [2022-03-15 21:30:46,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:46,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463295050] [2022-03-15 21:30:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:46,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:46,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:46,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463295050] [2022-03-15 21:30:46,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463295050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:46,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730197088] [2022-03-15 21:30:46,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:46,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:46,534 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 21:30:46,535 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 21:30:46,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:30:46,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:46,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:30:46,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:46,785 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-03-15 21:30:46,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 151 treesize of output 153 [2022-03-15 21:31:57,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:31:57,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 439 treesize of output 289 [2022-03-15 21:31:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:57,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:57,711 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-03-15 21:31:57,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 172 treesize of output 180 [2022-03-15 21:31:57,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:31:57,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 296 [2022-03-15 21:31:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:58,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730197088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:58,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:58,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 27 [2022-03-15 21:31:58,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1045624610] [2022-03-15 21:31:58,532 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:58,533 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:58,555 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 70 transitions. [2022-03-15 21:31:58,555 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:58,762 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:31:58,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:31:58,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:58,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:31:58,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:31:58,763 INFO L87 Difference]: Start difference. First operand 462 states and 1211 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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 21:31:58,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:58,938 INFO L93 Difference]: Finished difference Result 568 states and 1409 transitions. [2022-03-15 21:31:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:31:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:31:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:58,939 INFO L225 Difference]: With dead ends: 568 [2022-03-15 21:31:58,939 INFO L226 Difference]: Without dead ends: 565 [2022-03-15 21:31:58,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:31:58,940 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:58,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:31:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-15 21:31:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 514. [2022-03-15 21:31:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 2.6237816764132553) internal successors, (1346), 513 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:58,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1346 transitions. [2022-03-15 21:31:58,947 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1346 transitions. Word has length 22 [2022-03-15 21:31:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:58,948 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1346 transitions. [2022-03-15 21:31:58,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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 21:31:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1346 transitions. [2022-03-15 21:31:58,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:31:58,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:58,949 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:58,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:59,163 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 21:31:59,163 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:59,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2040453181, now seen corresponding path program 180 times [2022-03-15 21:31:59,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:59,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865609050] [2022-03-15 21:31:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:59,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:31:59,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:59,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865609050] [2022-03-15 21:31:59,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865609050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:59,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137221490] [2022-03-15 21:31:59,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:31:59,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:59,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:59,228 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 21:31:59,254 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 21:31:59,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:31:59,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:59,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:31:59,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:59,936 INFO L353 Elim1Store]: treesize reduction 905, result has 19.8 percent of original size [2022-03-15 21:31:59,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 20 new quantified variables, introduced 78 case distinctions, treesize of input 248 treesize of output 308 [2022-03-15 21:32:00,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:00,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 286 [2022-03-15 21:32:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:00,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:01,057 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-03-15 21:32:01,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 196 treesize of output 190 [2022-03-15 21:32:01,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:01,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 460 treesize of output 296 [2022-03-15 21:32:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:01,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137221490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:01,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:01,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 34 [2022-03-15 21:32:01,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1436292299] [2022-03-15 21:32:01,759 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:01,760 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:01,764 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2022-03-15 21:32:01,764 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:01,822 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [223249#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:32:01,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:32:01,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:01,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:32:01,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:01,823 INFO L87 Difference]: Start difference. First operand 514 states and 1346 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:02,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:02,019 INFO L93 Difference]: Finished difference Result 671 states and 1660 transitions. [2022-03-15 21:32:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:32:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:32:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:02,020 INFO L225 Difference]: With dead ends: 671 [2022-03-15 21:32:02,020 INFO L226 Difference]: Without dead ends: 668 [2022-03-15 21:32:02,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:02,021 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:02,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:32:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-03-15 21:32:02,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 568. [2022-03-15 21:32:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 2.673721340388007) internal successors, (1516), 567 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1516 transitions. [2022-03-15 21:32:02,029 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1516 transitions. Word has length 22 [2022-03-15 21:32:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:02,029 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 1516 transitions. [2022-03-15 21:32:02,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1516 transitions. [2022-03-15 21:32:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:32:02,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:02,030 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:02,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-15 21:32:02,243 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 21:32:02,243 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 861451809, now seen corresponding path program 181 times [2022-03-15 21:32:02,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:02,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035064285] [2022-03-15 21:32:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:02,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:32:02,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:02,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035064285] [2022-03-15 21:32:02,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035064285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:02,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704068678] [2022-03-15 21:32:02,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:32:02,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:02,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:02,297 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 21:32:02,298 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 21:32:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:02,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:32:02,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:02,778 INFO L353 Elim1Store]: treesize reduction 520, result has 29.8 percent of original size [2022-03-15 21:32:02,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 201 treesize of output 287 [2022-03-15 21:32:03,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:03,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 367 treesize of output 286 [2022-03-15 21:32:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:04,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:04,456 INFO L353 Elim1Store]: treesize reduction 124, result has 44.9 percent of original size [2022-03-15 21:32:04,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 212 treesize of output 218 [2022-03-15 21:32:04,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:04,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 486 treesize of output 296 [2022-03-15 21:32:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:04,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704068678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:04,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:04,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 32 [2022-03-15 21:32:04,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1335026496] [2022-03-15 21:32:04,930 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:04,931 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:04,935 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2022-03-15 21:32:04,935 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:05,034 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [225275#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 225274#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:32:05,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:32:05,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:05,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:32:05,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:05,034 INFO L87 Difference]: Start difference. First operand 568 states and 1516 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 21:32:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:05,245 INFO L93 Difference]: Finished difference Result 729 states and 1832 transitions. [2022-03-15 21:32:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:32:05,245 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:32:05,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:05,246 INFO L225 Difference]: With dead ends: 729 [2022-03-15 21:32:05,246 INFO L226 Difference]: Without dead ends: 726 [2022-03-15 21:32:05,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:05,247 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:05,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:32:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-03-15 21:32:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 612. [2022-03-15 21:32:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.716857610474632) internal successors, (1660), 611 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1660 transitions. [2022-03-15 21:32:05,256 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1660 transitions. Word has length 22 [2022-03-15 21:32:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:05,256 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1660 transitions. [2022-03-15 21:32:05,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 21:32:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1660 transitions. [2022-03-15 21:32:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:32:05,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:05,257 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:05,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:05,457 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 21:32:05,458 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:05,458 INFO L85 PathProgramCache]: Analyzing trace with hash 626193283, now seen corresponding path program 182 times [2022-03-15 21:32:05,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:05,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999653956] [2022-03-15 21:32:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:05,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:32:05,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:05,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999653956] [2022-03-15 21:32:05,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999653956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:05,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146153978] [2022-03-15 21:32:05,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:32:05,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:05,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:05,510 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 21:32:05,511 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 21:32:05,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:32:05,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:05,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:32:05,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:05,904 INFO L353 Elim1Store]: treesize reduction 363, result has 32.9 percent of original size [2022-03-15 21:32:05,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 45 case distinctions, treesize of input 207 treesize of output 238 [2022-03-15 21:32:06,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:06,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 315 treesize of output 286 [2022-03-15 21:32:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:06,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:07,125 INFO L353 Elim1Store]: treesize reduction 184, result has 36.3 percent of original size [2022-03-15 21:32:07,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 220 treesize of output 242 [2022-03-15 21:32:07,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:07,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 296 [2022-03-15 21:32:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:07,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146153978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:07,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:07,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 31 [2022-03-15 21:32:07,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [813496584] [2022-03-15 21:32:07,499 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:07,500 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:07,504 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2022-03-15 21:32:07,504 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:07,641 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [227390#(or (not (= (select f_inv (select f counter)) counter)) (= (select f (select f (select f counter))) 0) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 227389#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 227388#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0))] [2022-03-15 21:32:07,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:32:07,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:32:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:07,641 INFO L87 Difference]: Start difference. First operand 612 states and 1660 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) 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 21:32:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:07,836 INFO L93 Difference]: Finished difference Result 777 states and 1979 transitions. [2022-03-15 21:32:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:32:07,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) 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 22 [2022-03-15 21:32:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:07,837 INFO L225 Difference]: With dead ends: 777 [2022-03-15 21:32:07,837 INFO L226 Difference]: Without dead ends: 774 [2022-03-15 21:32:07,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:07,837 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:07,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:32:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-03-15 21:32:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 656. [2022-03-15 21:32:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7557251908396947) internal successors, (1805), 655 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1805 transitions. [2022-03-15 21:32:07,844 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1805 transitions. Word has length 22 [2022-03-15 21:32:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:07,844 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1805 transitions. [2022-03-15 21:32:07,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) 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 21:32:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1805 transitions. [2022-03-15 21:32:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:32:07,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:07,845 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:07,860 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 21:32:08,045 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 21:32:08,046 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1923113569, now seen corresponding path program 183 times [2022-03-15 21:32:08,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:08,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715146942] [2022-03-15 21:32:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:08,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:32:08,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:08,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715146942] [2022-03-15 21:32:08,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715146942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:08,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157352298] [2022-03-15 21:32:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:32:08,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:08,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:08,098 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 21:32:08,098 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 21:32:08,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:32:08,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:08,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:32:08,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:08,612 INFO L353 Elim1Store]: treesize reduction 316, result has 32.6 percent of original size [2022-03-15 21:32:08,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 272 treesize of output 237 [2022-03-15 21:32:08,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:08,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 287 treesize of output 286 [2022-03-15 21:32:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:08,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:09,249 INFO L353 Elim1Store]: treesize reduction 252, result has 30.2 percent of original size [2022-03-15 21:32:09,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 220 treesize of output 262 [2022-03-15 21:32:09,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:09,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 296 [2022-03-15 21:32:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:09,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157352298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:09,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:09,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 34 [2022-03-15 21:32:09,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [710595813] [2022-03-15 21:32:09,857 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:09,858 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:09,862 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2022-03-15 21:32:09,862 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:09,987 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [229584#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0)), 229588#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 229643#(or (not (= (select f (select f (select f counter))) (select f_inv (select f (select f (select f (select f counter))))))) (not (= (select f_inv (select f counter)) counter)) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter))) (= (select f (select f (select f (select f counter)))) 0)), 229642#(or (not (= (select f_inv (select f counter)) counter)) (= (select f (select f (select f counter))) 0) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter))))] [2022-03-15 21:32:09,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:32:09,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:32:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:32:09,988 INFO L87 Difference]: Start difference. First operand 656 states and 1805 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:10,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:10,199 INFO L93 Difference]: Finished difference Result 825 states and 2128 transitions. [2022-03-15 21:32:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:32:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:32:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:10,201 INFO L225 Difference]: With dead ends: 825 [2022-03-15 21:32:10,201 INFO L226 Difference]: Without dead ends: 822 [2022-03-15 21:32:10,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:32:10,201 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:10,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:32:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-03-15 21:32:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 700. [2022-03-15 21:32:10,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 2.7896995708154506) internal successors, (1950), 699 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:10,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1950 transitions. [2022-03-15 21:32:10,208 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1950 transitions. Word has length 22 [2022-03-15 21:32:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:10,209 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1950 transitions. [2022-03-15 21:32:10,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:10,209 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1950 transitions. [2022-03-15 21:32:10,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:32:10,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:10,209 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:10,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-15 21:32:10,410 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 21:32:10,410 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash -822030525, now seen corresponding path program 184 times [2022-03-15 21:32:10,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:10,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891437674] [2022-03-15 21:32:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:10,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:32:10,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:10,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891437674] [2022-03-15 21:32:10,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891437674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:10,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125200687] [2022-03-15 21:32:10,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:32:10,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:10,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:10,462 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 21:32:10,463 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 21:32:10,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:32:10,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:10,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:32:10,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:10,766 INFO L353 Elim1Store]: treesize reduction 139, result has 47.9 percent of original size [2022-03-15 21:32:10,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 195 treesize of output 182 [2022-03-15 21:32:34,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:34,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 345 treesize of output 286 [2022-03-15 21:32:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:34,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:35,222 INFO L353 Elim1Store]: treesize reduction 328, result has 25.6 percent of original size [2022-03-15 21:32:35,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 212 treesize of output 278 [2022-03-15 21:32:35,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:35,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 492 treesize of output 296 [2022-03-15 21:32:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:35,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125200687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:35,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:35,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 29 [2022-03-15 21:32:35,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [537891071] [2022-03-15 21:32:35,818 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:35,819 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:35,823 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2022-03-15 21:32:35,823 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:36,020 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [232029#(or (not (= (select f (select f (select f counter))) (select f_inv (select f (select f (select f (select f counter))))))) (not (= (select f_inv (select f counter)) counter)) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter))) (= (select f (select f (select f (select f counter)))) 0)), 232026#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0)), 232028#(or (not (= (select f_inv (select f counter)) counter)) (= (select f (select f (select f counter))) 0) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 232027#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 232030#(or (not (= (select f (select f (select f counter))) (select f_inv (select f (select f (select f (select f counter))))))) (= (select f (select f (select f (select f (select f counter))))) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f (select f (select f (select f counter)))))) (select f (select f (select f (select f counter)))))) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter))))] [2022-03-15 21:32:36,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:32:36,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:36,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:32:36,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:36,021 INFO L87 Difference]: Start difference. First operand 700 states and 1950 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:36,234 INFO L93 Difference]: Finished difference Result 873 states and 2278 transitions. [2022-03-15 21:32:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:32:36,234 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:32:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:36,235 INFO L225 Difference]: With dead ends: 873 [2022-03-15 21:32:36,235 INFO L226 Difference]: Without dead ends: 870 [2022-03-15 21:32:36,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:36,235 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:36,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:32:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-03-15 21:32:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 744. [2022-03-15 21:32:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.819650067294751) internal successors, (2095), 743 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:36,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2095 transitions. [2022-03-15 21:32:36,244 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2095 transitions. Word has length 22 [2022-03-15 21:32:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:36,244 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2095 transitions. [2022-03-15 21:32:36,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2095 transitions. [2022-03-15 21:32:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:32:36,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:36,245 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:36,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-15 21:32:36,445 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 21:32:36,445 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash -22151519, now seen corresponding path program 185 times [2022-03-15 21:32:36,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:36,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270190717] [2022-03-15 21:32:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:32:36,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:36,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270190717] [2022-03-15 21:32:36,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270190717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:36,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465469683] [2022-03-15 21:32:36,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:32:36,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:36,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:36,501 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 21:32:36,502 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 21:32:36,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:32:36,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:36,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 21:32:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:36,884 INFO L353 Elim1Store]: treesize reduction 130, result has 45.6 percent of original size [2022-03-15 21:32:36,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 230 treesize of output 185 [2022-03-15 21:32:54,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:54,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 315 treesize of output 286 [2022-03-15 21:32:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:54,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:55,362 INFO L353 Elim1Store]: treesize reduction 508, result has 18.7 percent of original size [2022-03-15 21:32:55,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 25 new quantified variables, introduced 78 case distinctions, treesize of input 208 treesize of output 300 [2022-03-15 21:32:55,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:55,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 498 treesize of output 296 [2022-03-15 21:32:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:55,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465469683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:55,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:55,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 31 [2022-03-15 21:32:55,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1836227010] [2022-03-15 21:32:55,918 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:55,919 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:55,923 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2022-03-15 21:32:55,923 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:56,181 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [234556#(or (= (select f (select f (select f (select f (select f (select f counter)))))) 0) (not (= (select f (select f (select f counter))) (select f_inv (select f (select f (select f (select f counter))))))) (not (= (select f (select f (select f (select f (select f counter))))) (select f_inv (select f (select f (select f (select f (select f (select f counter))))))))) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f (select f (select f (select f counter)))))) (select f (select f (select f (select f counter)))))) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 234554#(or (not (= (select f (select f (select f counter))) (select f_inv (select f (select f (select f (select f counter))))))) (not (= (select f_inv (select f counter)) counter)) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter))) (= (select f (select f (select f (select f counter)))) 0)), 234555#(or (not (= (select f (select f (select f counter))) (select f_inv (select f (select f (select f (select f counter))))))) (= (select f (select f (select f (select f (select f counter))))) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f (select f (select f (select f counter)))))) (select f (select f (select f (select f counter)))))) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 234551#(or (not (= (select f_inv (select f counter)) counter)) (= (select f counter) 0)), 234553#(or (not (= (select f_inv (select f counter)) counter)) (= (select f (select f (select f counter))) 0) (not (= (select f (select f counter)) (select f_inv (select f (select f (select f counter)))))) (not (= (select f_inv (select f (select f counter))) (select f counter)))), 234552#(or (= (select f (select f counter)) 0) (not (= (select f_inv (select f counter)) counter)) (not (= (select f_inv (select f (select f counter))) (select f counter))))] [2022-03-15 21:32:56,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:32:56,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:32:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:32:56,182 INFO L87 Difference]: Start difference. First operand 744 states and 2095 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) 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 21:32:56,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:56,399 INFO L93 Difference]: Finished difference Result 908 states and 2391 transitions. [2022-03-15 21:32:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:32:56,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) 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 22 [2022-03-15 21:32:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:56,400 INFO L225 Difference]: With dead ends: 908 [2022-03-15 21:32:56,401 INFO L226 Difference]: Without dead ends: 905 [2022-03-15 21:32:56,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:32:56,401 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:56,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:32:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-03-15 21:32:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 779. [2022-03-15 21:32:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 2.840616966580977) internal successors, (2210), 778 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2210 transitions. [2022-03-15 21:32:56,410 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2210 transitions. Word has length 22 [2022-03-15 21:32:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:56,410 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 2210 transitions. [2022-03-15 21:32:56,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) 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 21:32:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2210 transitions. [2022-03-15 21:32:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:32:56,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:56,411 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:56,432 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 21:32:56,629 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 21:32:56,629 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:56,629 INFO L85 PathProgramCache]: Analyzing trace with hash -995706109, now seen corresponding path program 186 times [2022-03-15 21:32:56,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:56,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068453874] [2022-03-15 21:32:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:56,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:56,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:56,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068453874] [2022-03-15 21:32:56,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068453874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:56,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653163251] [2022-03-15 21:32:56,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:32:56,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:56,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:56,683 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 21:32:56,683 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 21:32:56,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:32:56,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:32:56,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:57,433 INFO L353 Elim1Store]: treesize reduction 1059, result has 18.4 percent of original size [2022-03-15 21:32:57,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 19 new quantified variables, introduced 78 case distinctions, treesize of input 224 treesize of output 327 [2022-03-15 21:32:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:57,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:57,932 INFO L353 Elim1Store]: treesize reduction 128, result has 43.1 percent of original size [2022-03-15 21:32:57,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 232 treesize of output 214 [2022-03-15 21:32:57,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:32:57,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 510 treesize of output 296 [2022-03-15 21:32:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:58,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653163251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:58,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:58,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 34 [2022-03-15 21:32:58,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1444108483] [2022-03-15 21:32:58,455 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:58,456 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:58,459 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2022-03-15 21:32:58,459 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:58,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:32:58,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:32:58,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:32:58,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:32:58,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:32:58,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:32:58,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-03-15 21:32:58,532 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:32:58,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:32:58,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:32:58,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:58,533 INFO L87 Difference]: Start difference. First operand 779 states and 2210 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:58,693 INFO L93 Difference]: Finished difference Result 899 states and 2408 transitions. [2022-03-15 21:32:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:32:58,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 22 [2022-03-15 21:32:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:58,694 INFO L225 Difference]: With dead ends: 899 [2022-03-15 21:32:58,694 INFO L226 Difference]: Without dead ends: 896 [2022-03-15 21:32:58,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:58,695 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:58,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:32:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-03-15 21:32:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 802. [2022-03-15 21:32:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 2.853932584269663) internal successors, (2286), 801 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2286 transitions. [2022-03-15 21:32:58,703 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2286 transitions. Word has length 22 [2022-03-15 21:32:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:58,704 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 2286 transitions. [2022-03-15 21:32:58,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2286 transitions. [2022-03-15 21:32:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:32:58,704 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:58,704 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:58,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-03-15 21:32:58,905 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 21:32:58,905 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1287150598, now seen corresponding path program 187 times [2022-03-15 21:32:58,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:58,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661777309] [2022-03-15 21:32:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:58,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:59,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:59,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661777309] [2022-03-15 21:32:59,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661777309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:59,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051890434] [2022-03-15 21:32:59,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:32:59,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:59,027 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 21:32:59,028 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 21:32:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:59,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:32:59,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:59,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:59,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051890434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:59,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:59,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2022-03-15 21:32:59,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [196284602] [2022-03-15 21:32:59,472 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:59,473 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:59,477 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 42 transitions. [2022-03-15 21:32:59,477 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:59,693 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [239855#(or (<= N1 (+ i1 1)) (< i2 N2)), 239858#(or (<= N1 (+ i1 4)) (< i2 N2)), 239854#(or (< i2 N2) (<= N1 i1)), 239859#(or (<= N1 (+ 5 i1)) (< i2 N2)), 239857#(or (<= N1 (+ 3 i1)) (< i2 N2)), 239853#(or (< i2 N2) (<= (+ N1 1) i1)), 239852#(< i2 N2), 239856#(or (<= N1 (+ 2 i1)) (< i2 N2))] [2022-03-15 21:32:59,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:32:59,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:32:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1553, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:32:59,694 INFO L87 Difference]: Start difference. First operand 802 states and 2286 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 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 21:33:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:00,020 INFO L93 Difference]: Finished difference Result 1122 states and 2789 transitions. [2022-03-15 21:33:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:33:00,020 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:33:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:00,021 INFO L225 Difference]: With dead ends: 1122 [2022-03-15 21:33:00,021 INFO L226 Difference]: Without dead ends: 1094 [2022-03-15 21:33:00,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=942, Invalid=2718, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:33:00,022 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 142 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:00,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 0 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-03-15 21:33:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 635. [2022-03-15 21:33:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 2.8391167192429023) internal successors, (1800), 634 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 21:33:00,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1800 transitions. [2022-03-15 21:33:00,030 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1800 transitions. Word has length 22 [2022-03-15 21:33:00,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:00,030 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1800 transitions. [2022-03-15 21:33:00,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 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 21:33:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1800 transitions. [2022-03-15 21:33:00,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:00,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:00,031 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:00,046 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 21:33:00,232 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 21:33:00,233 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1662485130, now seen corresponding path program 188 times [2022-03-15 21:33:00,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:00,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175001776] [2022-03-15 21:33:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:00,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:00,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:00,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175001776] [2022-03-15 21:33:00,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175001776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:00,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089998067] [2022-03-15 21:33:00,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:00,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:00,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:00,371 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 21:33:00,371 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 21:33:00,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:00,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:00,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:00,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:00,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:00,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089998067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:00,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:00,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2022-03-15 21:33:00,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [221442429] [2022-03-15 21:33:00,885 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:00,886 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:00,901 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 75 transitions. [2022-03-15 21:33:00,901 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:01,278 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [242462#(or (< i1 N1) (<= N2 (+ 5 i2))), 242457#(or (<= N2 i2) (< i1 N1)), 242463#(or (<= N2 (+ 6 i2)) (< i1 N1)), 242461#(or (< i1 N1) (<= N2 (+ i2 4))), 242456#(< i1 N1), 242458#(or (<= N2 (+ i2 1)) (< i1 N1)), 242459#(or (< i1 N1) (<= N2 (+ 2 i2))), 242460#(or (<= N2 (+ 3 i2)) (< i1 N1))] [2022-03-15 21:33:01,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:33:01,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:01,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:33:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:33:01,279 INFO L87 Difference]: Start difference. First operand 635 states and 1800 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 21:33:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:01,657 INFO L93 Difference]: Finished difference Result 1035 states and 2501 transitions. [2022-03-15 21:33:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:33:01,658 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 23 [2022-03-15 21:33:01,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:01,659 INFO L225 Difference]: With dead ends: 1035 [2022-03-15 21:33:01,659 INFO L226 Difference]: Without dead ends: 1018 [2022-03-15 21:33:01,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1164, Invalid=3258, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:33:01,660 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:01,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-03-15 21:33:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 718. [2022-03-15 21:33:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 2.679218967921897) internal successors, (1921), 717 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1921 transitions. [2022-03-15 21:33:01,669 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1921 transitions. Word has length 23 [2022-03-15 21:33:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:01,669 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1921 transitions. [2022-03-15 21:33:01,669 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 21:33:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1921 transitions. [2022-03-15 21:33:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:01,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:01,670 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:01,686 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 21:33:01,871 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 21:33:01,871 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2039202643, now seen corresponding path program 189 times [2022-03-15 21:33:01,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:01,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724434021] [2022-03-15 21:33:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:01,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:02,026 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 21:33:02,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:02,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724434021] [2022-03-15 21:33:02,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724434021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:02,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237102380] [2022-03-15 21:33:02,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:02,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:02,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:02,028 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 21:33:02,032 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 21:33:02,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:33:02,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:02,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:02,347 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 21:33:02,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:02,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237102380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:02,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:02,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2022-03-15 21:33:02,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [552742672] [2022-03-15 21:33:02,531 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:02,532 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:02,538 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 73 transitions. [2022-03-15 21:33:02,539 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:02,944 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [245145#(or (< i2 N2) (< i1 N1)), 245144#(< i1 N1), 245147#(or (< i1 N1) (<= (+ 3 i2) N2)), 245150#(or (< i1 N1) (<= (+ 6 i2) N2)), 245148#(or (<= (+ i2 4) N2) (< i1 N1)), 245149#(or (< i1 N1) (<= (+ 5 i2) N2)), 245146#(or (< i1 N1) (<= (+ 2 i2) N2)), 245151#(or (<= (+ 7 i2) N2) (< i1 N1))] [2022-03-15 21:33:02,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:33:02,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:02,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:33:02,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2066, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:33:02,944 INFO L87 Difference]: Start difference. First operand 718 states and 1921 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:03,292 INFO L93 Difference]: Finished difference Result 862 states and 2130 transitions. [2022-03-15 21:33:03,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:33:03,292 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:33:03,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:03,293 INFO L225 Difference]: With dead ends: 862 [2022-03-15 21:33:03,293 INFO L226 Difference]: Without dead ends: 836 [2022-03-15 21:33:03,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 10 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=889, Invalid=3401, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:33:03,294 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 130 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:03,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 0 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:03,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-03-15 21:33:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 708. [2022-03-15 21:33:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.659123055162659) internal successors, (1880), 707 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1880 transitions. [2022-03-15 21:33:03,301 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1880 transitions. Word has length 23 [2022-03-15 21:33:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:03,301 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 1880 transitions. [2022-03-15 21:33:03,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1880 transitions. [2022-03-15 21:33:03,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:03,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:03,302 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:03,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-03-15 21:33:03,502 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 21:33:03,502 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:03,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:03,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1611506549, now seen corresponding path program 190 times [2022-03-15 21:33:03,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:03,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122303944] [2022-03-15 21:33:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:03,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:03,612 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 21:33:03,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:03,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122303944] [2022-03-15 21:33:03,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122303944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:03,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60482822] [2022-03-15 21:33:03,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:03,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:03,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:03,614 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 21:33:03,616 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 21:33:03,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:03,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:03,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:03,922 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 21:33:03,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:04,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60482822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:04,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:04,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 41 [2022-03-15 21:33:04,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1022751762] [2022-03-15 21:33:04,214 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:04,215 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:04,220 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:33:04,220 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:04,316 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [247634#(< i2 N2)] [2022-03-15 21:33:04,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:33:04,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:04,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:33:04,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1353, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:33:04,317 INFO L87 Difference]: Start difference. First operand 708 states and 1880 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 21:33:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:04,650 INFO L93 Difference]: Finished difference Result 781 states and 2006 transitions. [2022-03-15 21:33:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:33:04,650 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 23 [2022-03-15 21:33:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:04,651 INFO L225 Difference]: With dead ends: 781 [2022-03-15 21:33:04,651 INFO L226 Difference]: Without dead ends: 780 [2022-03-15 21:33:04,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:33:04,652 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:04,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:04,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-03-15 21:33:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 708. [2022-03-15 21:33:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.6577086280056577) internal successors, (1879), 707 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1879 transitions. [2022-03-15 21:33:04,659 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1879 transitions. Word has length 23 [2022-03-15 21:33:04,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:04,659 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 1879 transitions. [2022-03-15 21:33:04,659 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 21:33:04,659 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1879 transitions. [2022-03-15 21:33:04,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:04,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:04,660 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:04,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-03-15 21:33:04,860 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 21:33:04,860 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1170437772, now seen corresponding path program 191 times [2022-03-15 21:33:04,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:04,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318691159] [2022-03-15 21:33:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:04,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:04,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:04,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318691159] [2022-03-15 21:33:04,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318691159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:04,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932862279] [2022-03-15 21:33:04,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:04,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:04,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:04,952 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 21:33:04,953 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 21:33:04,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:33:04,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:04,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:04,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:05,258 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 21:33:05,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:05,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932862279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:05,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:05,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 41 [2022-03-15 21:33:05,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1928676926] [2022-03-15 21:33:05,599 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:05,600 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:05,605 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:33:05,605 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:05,700 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [250048#(< i1 N1)] [2022-03-15 21:33:05,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:33:05,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:33:05,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=1370, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:33:05,701 INFO L87 Difference]: Start difference. First operand 708 states and 1879 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:05,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:05,904 INFO L93 Difference]: Finished difference Result 938 states and 2259 transitions. [2022-03-15 21:33:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:33:05,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 21:33:05,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:05,905 INFO L225 Difference]: With dead ends: 938 [2022-03-15 21:33:05,905 INFO L226 Difference]: Without dead ends: 936 [2022-03-15 21:33:05,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=672, Invalid=1980, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:33:05,906 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:05,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-03-15 21:33:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 719. [2022-03-15 21:33:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.647632311977716) internal successors, (1901), 718 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1901 transitions. [2022-03-15 21:33:05,916 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1901 transitions. Word has length 23 [2022-03-15 21:33:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:05,916 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1901 transitions. [2022-03-15 21:33:05,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1901 transitions. [2022-03-15 21:33:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:05,917 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:05,917 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:05,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-15 21:33:06,117 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 21:33:06,118 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1231181621, now seen corresponding path program 192 times [2022-03-15 21:33:06,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:06,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974617422] [2022-03-15 21:33:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:06,219 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 21:33:06,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:06,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974617422] [2022-03-15 21:33:06,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974617422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:06,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528143766] [2022-03-15 21:33:06,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:06,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:06,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:06,221 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 21:33:06,221 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 21:33:06,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:33:06,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:06,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:06,545 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 21:33:06,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:06,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528143766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:06,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:06,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 42 [2022-03-15 21:33:06,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [49310356] [2022-03-15 21:33:06,850 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:06,851 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:06,856 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:33:06,856 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:06,990 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [252618#(< i1 N1), 252620#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 252619#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:06,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:33:06,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:06,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:33:06,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=1647, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:33:06,991 INFO L87 Difference]: Start difference. First operand 719 states and 1901 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:07,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:07,769 INFO L93 Difference]: Finished difference Result 983 states and 2348 transitions. [2022-03-15 21:33:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:33:07,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 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 21:33:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:07,770 INFO L225 Difference]: With dead ends: 983 [2022-03-15 21:33:07,771 INFO L226 Difference]: Without dead ends: 981 [2022-03-15 21:33:07,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1325, Invalid=4995, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:33:07,771 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:07,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:07,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-03-15 21:33:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 744. [2022-03-15 21:33:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.6500672947510093) internal successors, (1969), 743 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1969 transitions. [2022-03-15 21:33:07,781 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1969 transitions. Word has length 23 [2022-03-15 21:33:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:07,782 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 1969 transitions. [2022-03-15 21:33:07,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1969 transitions. [2022-03-15 21:33:07,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:07,783 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:07,783 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:07,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:08,003 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 21:33:08,003 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:08,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:08,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2118685302, now seen corresponding path program 193 times [2022-03-15 21:33:08,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:08,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412216215] [2022-03-15 21:33:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:08,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:08,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:08,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412216215] [2022-03-15 21:33:08,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412216215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:08,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292649082] [2022-03-15 21:33:08,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:08,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:08,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:08,107 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 21:33:08,108 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 21:33:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:08,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:08,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:08,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292649082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:08,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:08,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 43 [2022-03-15 21:33:08,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [584326291] [2022-03-15 21:33:08,768 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:08,769 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:08,774 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:33:08,774 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:08,876 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [255269#(< i1 N1), 255336#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:08,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:33:08,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:33:08,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:33:08,877 INFO L87 Difference]: Start difference. First operand 744 states and 1969 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:09,127 INFO L93 Difference]: Finished difference Result 1006 states and 2404 transitions. [2022-03-15 21:33:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:33:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 21:33:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:09,128 INFO L225 Difference]: With dead ends: 1006 [2022-03-15 21:33:09,128 INFO L226 Difference]: Without dead ends: 1006 [2022-03-15 21:33:09,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=638, Invalid=2332, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:33:09,129 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:09,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-03-15 21:33:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 746. [2022-03-15 21:33:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.651006711409396) internal successors, (1975), 745 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1975 transitions. [2022-03-15 21:33:09,138 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1975 transitions. Word has length 23 [2022-03-15 21:33:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:09,138 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1975 transitions. [2022-03-15 21:33:09,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1975 transitions. [2022-03-15 21:33:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:09,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:09,139 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:09,154 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 21:33:09,339 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 21:33:09,339 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:09,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:09,339 INFO L85 PathProgramCache]: Analyzing trace with hash 935179246, now seen corresponding path program 194 times [2022-03-15 21:33:09,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:09,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354644292] [2022-03-15 21:33:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:09,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:09,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:09,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354644292] [2022-03-15 21:33:09,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354644292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:09,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105816230] [2022-03-15 21:33:09,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:09,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:09,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:09,429 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 21:33:09,429 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 21:33:09,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:09,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:09,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:09,733 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 21:33:09,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:10,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105816230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:10,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:10,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 41 [2022-03-15 21:33:10,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [555122124] [2022-03-15 21:33:10,055 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:10,056 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:10,060 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:33:10,061 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:10,136 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [258029#(< i1 N1)] [2022-03-15 21:33:10,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:33:10,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:10,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:33:10,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:33:10,137 INFO L87 Difference]: Start difference. First operand 746 states and 1975 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 21:33:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:10,361 INFO L93 Difference]: Finished difference Result 1033 states and 2467 transitions. [2022-03-15 21:33:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:33:10,362 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 23 [2022-03-15 21:33:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:10,363 INFO L225 Difference]: With dead ends: 1033 [2022-03-15 21:33:10,363 INFO L226 Difference]: Without dead ends: 1029 [2022-03-15 21:33:10,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=726, Invalid=2136, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:33:10,364 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:10,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-03-15 21:33:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 766. [2022-03-15 21:33:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 2.6470588235294117) internal successors, (2025), 765 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2025 transitions. [2022-03-15 21:33:10,379 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2025 transitions. Word has length 23 [2022-03-15 21:33:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:10,379 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 2025 transitions. [2022-03-15 21:33:10,379 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 21:33:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2025 transitions. [2022-03-15 21:33:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:10,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:10,380 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:10,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-03-15 21:33:10,580 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 21:33:10,580 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:10,580 INFO L85 PathProgramCache]: Analyzing trace with hash 995923095, now seen corresponding path program 195 times [2022-03-15 21:33:10,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:10,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003250248] [2022-03-15 21:33:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:10,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:10,698 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 21:33:10,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:10,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003250248] [2022-03-15 21:33:10,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003250248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:10,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500482513] [2022-03-15 21:33:10,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:10,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:10,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:10,700 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 21:33:10,701 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 21:33:10,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:33:10,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:10,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:10,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:11,108 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 21:33:11,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:11,416 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 21:33:11,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500482513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:11,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:11,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 42 [2022-03-15 21:33:11,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [123651453] [2022-03-15 21:33:11,416 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:11,417 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:11,422 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:33:11,422 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:11,570 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [260792#(< i1 N1), 260794#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 260793#(or (< (+ i1 1) N1) (<= N1 i1)), 260795#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:33:11,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:33:11,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:11,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:33:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:33:11,570 INFO L87 Difference]: Start difference. First operand 766 states and 2025 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 21:33:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:12,516 INFO L93 Difference]: Finished difference Result 1106 states and 2598 transitions. [2022-03-15 21:33:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:33:12,517 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 23 [2022-03-15 21:33:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:12,518 INFO L225 Difference]: With dead ends: 1106 [2022-03-15 21:33:12,518 INFO L226 Difference]: Without dead ends: 1101 [2022-03-15 21:33:12,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1489, Invalid=5651, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 21:33:12,518 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:12,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-03-15 21:33:12,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 791. [2022-03-15 21:33:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 2.649367088607595) internal successors, (2093), 790 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2093 transitions. [2022-03-15 21:33:12,527 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2093 transitions. Word has length 23 [2022-03-15 21:33:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:12,527 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 2093 transitions. [2022-03-15 21:33:12,527 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 21:33:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2093 transitions. [2022-03-15 21:33:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:12,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:12,528 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:12,543 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 21:33:12,728 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 21:33:12,728 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:12,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1883426776, now seen corresponding path program 196 times [2022-03-15 21:33:12,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:12,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249916046] [2022-03-15 21:33:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:12,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:12,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:12,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249916046] [2022-03-15 21:33:12,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249916046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:12,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721700128] [2022-03-15 21:33:12,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:12,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:12,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:12,828 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 21:33:12,828 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 21:33:12,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:12,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:12,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:12,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:13,135 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 21:33:13,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:13,472 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 21:33:13,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721700128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:13,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:13,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 43 [2022-03-15 21:33:13,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1054699096] [2022-03-15 21:33:13,472 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:13,473 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:13,478 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:33:13,478 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:13,558 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [263736#(or (< (+ i1 1) N1) (<= N1 i1)), 263669#(< i1 N1)] [2022-03-15 21:33:13,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:33:13,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:13,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:33:13,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1588, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:33:13,559 INFO L87 Difference]: Start difference. First operand 791 states and 2093 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 21:33:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:13,768 INFO L93 Difference]: Finished difference Result 1010 states and 2433 transitions. [2022-03-15 21:33:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:33:13,769 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 21:33:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:13,770 INFO L225 Difference]: With dead ends: 1010 [2022-03-15 21:33:13,770 INFO L226 Difference]: Without dead ends: 1010 [2022-03-15 21:33:13,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=578, Invalid=2284, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:33:13,770 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:13,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:13,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-03-15 21:33:13,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 780. [2022-03-15 21:33:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.6290115532734273) internal successors, (2048), 779 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2048 transitions. [2022-03-15 21:33:13,785 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2048 transitions. Word has length 23 [2022-03-15 21:33:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:13,785 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2048 transitions. [2022-03-15 21:33:13,785 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 21:33:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2048 transitions. [2022-03-15 21:33:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:13,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:13,786 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:13,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-15 21:33:13,986 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 21:33:13,987 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1556233866, now seen corresponding path program 197 times [2022-03-15 21:33:13,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:13,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234232315] [2022-03-15 21:33:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:13,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:14,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:14,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234232315] [2022-03-15 21:33:14,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234232315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:14,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887119646] [2022-03-15 21:33:14,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:14,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:14,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:14,094 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 21:33:14,095 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 21:33:14,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:33:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:14,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:14,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887119646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:14,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:14,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 44 [2022-03-15 21:33:14,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1753081397] [2022-03-15 21:33:14,749 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:14,750 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:14,755 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:33:14,755 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:14,865 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [266435#(< i1 N1), 266502#(or (< (+ i1 1) N1) (<= N1 i1)), 266503#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:33:14,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:33:14,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:33:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=1746, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:33:14,866 INFO L87 Difference]: Start difference. First operand 780 states and 2048 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 21:33:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:15,172 INFO L93 Difference]: Finished difference Result 1043 states and 2484 transitions. [2022-03-15 21:33:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:33:15,172 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 23 [2022-03-15 21:33:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:15,173 INFO L225 Difference]: With dead ends: 1043 [2022-03-15 21:33:15,173 INFO L226 Difference]: Without dead ends: 1043 [2022-03-15 21:33:15,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=724, Invalid=2816, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:33:15,174 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:15,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-03-15 21:33:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 786. [2022-03-15 21:33:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.6318471337579616) internal successors, (2066), 785 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2066 transitions. [2022-03-15 21:33:15,183 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2066 transitions. Word has length 23 [2022-03-15 21:33:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:15,183 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2066 transitions. [2022-03-15 21:33:15,183 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 21:33:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2066 transitions. [2022-03-15 21:33:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:15,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:15,185 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:15,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-15 21:33:15,406 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 21:33:15,406 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:15,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2062867764, now seen corresponding path program 198 times [2022-03-15 21:33:15,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:15,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107661308] [2022-03-15 21:33:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:15,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 44 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:15,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:15,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107661308] [2022-03-15 21:33:15,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107661308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:15,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549690528] [2022-03-15 21:33:15,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:15,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:15,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:15,502 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 21:33:15,509 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 21:33:15,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:33:15,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:15,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:15,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:15,813 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 21:33:15,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:16,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549690528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:16,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:16,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 41 [2022-03-15 21:33:16,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1713564095] [2022-03-15 21:33:16,126 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:16,127 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:16,133 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:33:16,133 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:16,200 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [269319#(< i1 N1)] [2022-03-15 21:33:16,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:33:16,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:16,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:33:16,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1380, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:33:16,201 INFO L87 Difference]: Start difference. First operand 786 states and 2066 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:16,444 INFO L93 Difference]: Finished difference Result 1082 states and 2584 transitions. [2022-03-15 21:33:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:33:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 21:33:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:16,446 INFO L225 Difference]: With dead ends: 1082 [2022-03-15 21:33:16,446 INFO L226 Difference]: Without dead ends: 1078 [2022-03-15 21:33:16,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=782, Invalid=2298, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:33:16,447 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:16,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2022-03-15 21:33:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 807. [2022-03-15 21:33:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.642679900744417) internal successors, (2130), 806 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2130 transitions. [2022-03-15 21:33:16,459 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2130 transitions. Word has length 23 [2022-03-15 21:33:16,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:16,460 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 2130 transitions. [2022-03-15 21:33:16,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2130 transitions. [2022-03-15 21:33:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:16,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:16,461 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:16,487 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 21:33:16,683 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 21:33:16,683 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:16,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2002123915, now seen corresponding path program 199 times [2022-03-15 21:33:16,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:16,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585715506] [2022-03-15 21:33:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:16,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:16,781 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 21:33:16,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:16,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585715506] [2022-03-15 21:33:16,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585715506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:16,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490333337] [2022-03-15 21:33:16,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:16,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:16,782 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 21:33:16,783 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 21:33:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:16,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:16,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:17,099 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 21:33:17,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:17,419 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 21:33:17,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490333337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:17,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:17,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 42 [2022-03-15 21:33:17,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [549208074] [2022-03-15 21:33:17,420 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:17,421 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:17,425 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:33:17,425 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:17,594 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [272220#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 272217#(< i1 N1), 272218#(or (< (+ i1 1) N1) (<= N1 i1)), 272221#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 272219#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:33:17,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:33:17,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:17,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:33:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:33:17,595 INFO L87 Difference]: Start difference. First operand 807 states and 2130 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:18,658 INFO L93 Difference]: Finished difference Result 1183 states and 2757 transitions. [2022-03-15 21:33:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:33:18,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 21:33:18,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:18,660 INFO L225 Difference]: With dead ends: 1183 [2022-03-15 21:33:18,660 INFO L226 Difference]: Without dead ends: 1176 [2022-03-15 21:33:18,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1628, Invalid=6204, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 21:33:18,661 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 140 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:18,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 0 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-15 21:33:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 830. [2022-03-15 21:33:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.6417370325693605) internal successors, (2190), 829 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2190 transitions. [2022-03-15 21:33:18,670 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2190 transitions. Word has length 23 [2022-03-15 21:33:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:18,670 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2190 transitions. [2022-03-15 21:33:18,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2190 transitions. [2022-03-15 21:33:18,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:18,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:18,671 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:18,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:18,871 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 21:33:18,872 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1114620234, now seen corresponding path program 200 times [2022-03-15 21:33:18,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:18,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080171565] [2022-03-15 21:33:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:18,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:18,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:18,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080171565] [2022-03-15 21:33:18,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080171565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:18,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460250987] [2022-03-15 21:33:18,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:18,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:18,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:18,976 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 21:33:18,976 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 21:33:19,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:19,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:19,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:19,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:19,282 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 21:33:19,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:19,617 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 21:33:19,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460250987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:19,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:19,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 43 [2022-03-15 21:33:19,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1829591888] [2022-03-15 21:33:19,617 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:19,618 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:19,623 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 37 transitions. [2022-03-15 21:33:19,623 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:19,694 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [275256#(< i1 N1), 275323#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:19,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:33:19,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:19,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:33:19,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:33:19,695 INFO L87 Difference]: Start difference. First operand 830 states and 2190 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:19,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:19,949 INFO L93 Difference]: Finished difference Result 1112 states and 2656 transitions. [2022-03-15 21:33:19,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:33:19,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 21:33:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:19,951 INFO L225 Difference]: With dead ends: 1112 [2022-03-15 21:33:19,951 INFO L226 Difference]: Without dead ends: 1110 [2022-03-15 21:33:19,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=629, Invalid=2451, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:33:19,951 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:19,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:19,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2022-03-15 21:33:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 832. [2022-03-15 21:33:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.6329723225030084) internal successors, (2188), 831 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2188 transitions. [2022-03-15 21:33:19,960 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2188 transitions. Word has length 23 [2022-03-15 21:33:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:19,960 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 2188 transitions. [2022-03-15 21:33:19,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2188 transitions. [2022-03-15 21:33:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:19,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:19,961 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:19,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-03-15 21:33:20,161 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 21:33:20,162 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash -259313580, now seen corresponding path program 201 times [2022-03-15 21:33:20,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:20,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118262095] [2022-03-15 21:33:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 39 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:20,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:20,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118262095] [2022-03-15 21:33:20,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118262095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:20,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63021848] [2022-03-15 21:33:20,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:20,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:20,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:20,269 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 21:33:20,270 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 21:33:20,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:33:20,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:20,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:20,587 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 21:33:20,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:20,906 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 21:33:20,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63021848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:20,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:20,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 44 [2022-03-15 21:33:20,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1261379383] [2022-03-15 21:33:20,907 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:20,908 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:20,913 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:33:20,913 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:21,010 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [278300#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 278232#(< i1 N1), 278299#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:21,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:33:21,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:33:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1776, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:33:21,011 INFO L87 Difference]: Start difference. First operand 832 states and 2188 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 21:33:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:21,287 INFO L93 Difference]: Finished difference Result 1016 states and 2457 transitions. [2022-03-15 21:33:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:33:21,287 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 23 [2022-03-15 21:33:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:21,289 INFO L225 Difference]: With dead ends: 1016 [2022-03-15 21:33:21,289 INFO L226 Difference]: Without dead ends: 1016 [2022-03-15 21:33:21,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=629, Invalid=2677, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:33:21,289 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:21,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:21,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-03-15 21:33:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 810. [2022-03-15 21:33:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 2.619283065512979) internal successors, (2119), 809 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2119 transitions. [2022-03-15 21:33:21,298 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2119 transitions. Word has length 23 [2022-03-15 21:33:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:21,298 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 2119 transitions. [2022-03-15 21:33:21,298 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 21:33:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2119 transitions. [2022-03-15 21:33:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:21,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:21,299 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:21,315 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 21:33:21,499 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 21:33:21,500 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash 485388918, now seen corresponding path program 202 times [2022-03-15 21:33:21,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:21,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191631340] [2022-03-15 21:33:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:21,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:21,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:21,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191631340] [2022-03-15 21:33:21,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191631340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:21,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162880616] [2022-03-15 21:33:21,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:21,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:21,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:21,615 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 21:33:21,615 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 21:33:21,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:21,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:21,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:21,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:21,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:22,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162880616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:22,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:22,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 45 [2022-03-15 21:33:22,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [95090868] [2022-03-15 21:33:22,263 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:22,264 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:22,269 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:33:22,269 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:22,398 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [281137#(or (< (+ i1 1) N1) (<= N1 i1)), 281070#(< i1 N1), 281139#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 281138#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:33:22,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:33:22,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:22,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:33:22,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:33:22,398 INFO L87 Difference]: Start difference. First operand 810 states and 2119 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 21:33:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:22,762 INFO L93 Difference]: Finished difference Result 1035 states and 2478 transitions. [2022-03-15 21:33:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:33:22,762 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 23 [2022-03-15 21:33:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:22,764 INFO L225 Difference]: With dead ends: 1035 [2022-03-15 21:33:22,764 INFO L226 Difference]: Without dead ends: 1035 [2022-03-15 21:33:22,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=812, Invalid=3220, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:33:22,764 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:22,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-03-15 21:33:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 818. [2022-03-15 21:33:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 2.6230110159118727) internal successors, (2143), 817 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2143 transitions. [2022-03-15 21:33:22,773 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2143 transitions. Word has length 23 [2022-03-15 21:33:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:22,773 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 2143 transitions. [2022-03-15 21:33:22,773 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 21:33:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2143 transitions. [2022-03-15 21:33:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:22,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:22,774 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:22,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-15 21:33:22,974 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 21:33:22,975 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash -513044562, now seen corresponding path program 203 times [2022-03-15 21:33:22,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:22,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14051040] [2022-03-15 21:33:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:22,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:23,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:23,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14051040] [2022-03-15 21:33:23,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14051040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:23,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111355721] [2022-03-15 21:33:23,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:23,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:23,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:23,064 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 21:33:23,064 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 21:33:23,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:33:23,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:23,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:23,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:23,371 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 21:33:23,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:23,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111355721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:23,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:23,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 41 [2022-03-15 21:33:23,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [169358032] [2022-03-15 21:33:23,673 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:23,674 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:23,687 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 37 transitions. [2022-03-15 21:33:23,687 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:23,738 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [284015#(< i1 N1)] [2022-03-15 21:33:23,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:33:23,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:23,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:33:23,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:33:23,739 INFO L87 Difference]: Start difference. First operand 818 states and 2143 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:24,010 INFO L93 Difference]: Finished difference Result 1106 states and 2647 transitions. [2022-03-15 21:33:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:33:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 21:33:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:24,012 INFO L225 Difference]: With dead ends: 1106 [2022-03-15 21:33:24,012 INFO L226 Difference]: Without dead ends: 1102 [2022-03-15 21:33:24,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=840, Invalid=2466, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:33:24,012 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:24,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-03-15 21:33:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 838. [2022-03-15 21:33:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 2.6320191158900834) internal successors, (2203), 837 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2203 transitions. [2022-03-15 21:33:24,022 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2203 transitions. Word has length 23 [2022-03-15 21:33:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:24,022 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 2203 transitions. [2022-03-15 21:33:24,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2203 transitions. [2022-03-15 21:33:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:24,023 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:24,023 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:24,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-15 21:33:24,223 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 21:33:24,223 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:24,223 INFO L85 PathProgramCache]: Analyzing trace with hash -452300713, now seen corresponding path program 204 times [2022-03-15 21:33:24,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:24,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696088590] [2022-03-15 21:33:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:24,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:24,332 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 21:33:24,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:24,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696088590] [2022-03-15 21:33:24,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696088590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:24,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587063097] [2022-03-15 21:33:24,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:24,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:24,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:24,333 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 21:33:24,334 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 21:33:24,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:33:24,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:24,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:24,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:24,648 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 21:33:24,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:24,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587063097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:24,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:24,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 42 [2022-03-15 21:33:24,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1850548247] [2022-03-15 21:33:24,962 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:24,963 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:24,967 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:33:24,967 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:25,150 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [287005#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 287004#(or (< (+ i1 1) N1) (<= N1 i1)), 287003#(< i1 N1), 287007#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 287006#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 287008#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1))] [2022-03-15 21:33:25,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:33:25,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:33:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=1929, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:33:25,151 INFO L87 Difference]: Start difference. First operand 838 states and 2203 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:26,325 INFO L93 Difference]: Finished difference Result 1233 states and 2851 transitions. [2022-03-15 21:33:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 21:33:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 21:33:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:26,327 INFO L225 Difference]: With dead ends: 1233 [2022-03-15 21:33:26,327 INFO L226 Difference]: Without dead ends: 1224 [2022-03-15 21:33:26,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2314 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1731, Invalid=6641, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 21:33:26,328 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 151 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:26,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 0 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-03-15 21:33:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 861. [2022-03-15 21:33:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.625581395348837) internal successors, (2258), 860 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2258 transitions. [2022-03-15 21:33:26,337 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2258 transitions. Word has length 23 [2022-03-15 21:33:26,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:26,337 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 2258 transitions. [2022-03-15 21:33:26,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2258 transitions. [2022-03-15 21:33:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:26,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:26,338 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:26,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-15 21:33:26,539 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 21:33:26,539 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:26,539 INFO L85 PathProgramCache]: Analyzing trace with hash 435202968, now seen corresponding path program 205 times [2022-03-15 21:33:26,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:26,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099709703] [2022-03-15 21:33:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:26,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:26,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:26,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099709703] [2022-03-15 21:33:26,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099709703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:26,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644437294] [2022-03-15 21:33:26,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:26,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:26,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:26,637 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 21:33:26,638 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 21:33:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:26,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:26,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:26,943 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 21:33:26,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:27,271 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 21:33:27,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644437294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:27,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:27,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 43 [2022-03-15 21:33:27,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2147349031] [2022-03-15 21:33:27,272 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:27,273 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:27,277 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2022-03-15 21:33:27,277 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:27,335 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [290159#(< i1 N1), 290226#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:27,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:33:27,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:27,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:33:27,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:33:27,335 INFO L87 Difference]: Start difference. First operand 861 states and 2258 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 21:33:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:27,580 INFO L93 Difference]: Finished difference Result 1174 states and 2794 transitions. [2022-03-15 21:33:27,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:33:27,580 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 21:33:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:27,582 INFO L225 Difference]: With dead ends: 1174 [2022-03-15 21:33:27,582 INFO L226 Difference]: Without dead ends: 1172 [2022-03-15 21:33:27,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=652, Invalid=2540, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:33:27,582 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:27,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-03-15 21:33:27,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 869. [2022-03-15 21:33:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.6255760368663594) internal successors, (2279), 868 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2279 transitions. [2022-03-15 21:33:27,592 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2279 transitions. Word has length 23 [2022-03-15 21:33:27,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:27,592 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2279 transitions. [2022-03-15 21:33:27,592 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 21:33:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2279 transitions. [2022-03-15 21:33:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:27,593 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:27,593 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:27,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-03-15 21:33:27,793 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 21:33:27,794 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:27,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1290509622, now seen corresponding path program 206 times [2022-03-15 21:33:27,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:27,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538168441] [2022-03-15 21:33:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:27,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:27,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:27,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538168441] [2022-03-15 21:33:27,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538168441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:27,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911276952] [2022-03-15 21:33:27,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:27,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:27,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:27,900 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 21:33:27,900 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 21:33:27,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:27,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:27,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:27,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:28,209 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 21:33:28,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:28,530 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 21:33:28,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911276952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:28,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:28,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 44 [2022-03-15 21:33:28,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [549230039] [2022-03-15 21:33:28,530 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:28,531 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:28,535 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 37 transitions. [2022-03-15 21:33:28,536 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:28,632 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [293341#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 293340#(or (< (+ i1 1) N1) (<= N1 i1)), 293273#(< i1 N1)] [2022-03-15 21:33:28,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:33:28,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:28,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:33:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:33:28,632 INFO L87 Difference]: Start difference. First operand 869 states and 2279 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 21:33:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:28,935 INFO L93 Difference]: Finished difference Result 1137 states and 2720 transitions. [2022-03-15 21:33:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:33:28,935 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 23 [2022-03-15 21:33:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:28,936 INFO L225 Difference]: With dead ends: 1137 [2022-03-15 21:33:28,936 INFO L226 Difference]: Without dead ends: 1134 [2022-03-15 21:33:28,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=708, Invalid=2952, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:33:28,937 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:28,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-03-15 21:33:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 865. [2022-03-15 21:33:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.622685185185185) internal successors, (2266), 864 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2266 transitions. [2022-03-15 21:33:28,946 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2266 transitions. Word has length 23 [2022-03-15 21:33:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:28,946 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 2266 transitions. [2022-03-15 21:33:28,946 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 21:33:28,946 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2266 transitions. [2022-03-15 21:33:28,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:28,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:28,947 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:28,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:29,147 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 21:33:29,148 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:29,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2035212120, now seen corresponding path program 207 times [2022-03-15 21:33:29,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:29,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170720183] [2022-03-15 21:33:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:29,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:29,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:29,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170720183] [2022-03-15 21:33:29,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170720183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:29,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395751149] [2022-03-15 21:33:29,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:29,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:29,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:29,267 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 21:33:29,271 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 21:33:29,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:33:29,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:29,585 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 21:33:29,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:29,905 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 21:33:29,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395751149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:29,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:29,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 45 [2022-03-15 21:33:29,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1336173794] [2022-03-15 21:33:29,905 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:29,906 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:29,910 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:33:29,911 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:30,028 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [296417#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 296416#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 296348#(< i1 N1), 296415#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:30,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:33:30,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:30,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:33:30,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:33:30,029 INFO L87 Difference]: Start difference. First operand 865 states and 2266 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 21:33:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:30,346 INFO L93 Difference]: Finished difference Result 1018 states and 2475 transitions. [2022-03-15 21:33:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:33:30,346 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 23 [2022-03-15 21:33:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:30,347 INFO L225 Difference]: With dead ends: 1018 [2022-03-15 21:33:30,347 INFO L226 Difference]: Without dead ends: 1018 [2022-03-15 21:33:30,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=2980, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:33:30,348 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:30,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-03-15 21:33:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 834. [2022-03-15 21:33:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 2.617046818727491) internal successors, (2180), 833 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2180 transitions. [2022-03-15 21:33:30,356 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2180 transitions. Word has length 23 [2022-03-15 21:33:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:30,356 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 2180 transitions. [2022-03-15 21:33:30,356 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 21:33:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2180 transitions. [2022-03-15 21:33:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:30,357 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:30,357 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:30,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-15 21:33:30,557 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 21:33:30,558 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash -648814218, now seen corresponding path program 208 times [2022-03-15 21:33:30,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:30,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491271256] [2022-03-15 21:33:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:30,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:30,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:30,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491271256] [2022-03-15 21:33:30,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491271256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:30,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867554967] [2022-03-15 21:33:30,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:30,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:30,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:30,682 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 21:33:30,682 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 21:33:30,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:30,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:30,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:30,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:31,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867554967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:31,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:31,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 46 [2022-03-15 21:33:31,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [392189733] [2022-03-15 21:33:31,316 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:31,317 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:31,321 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:33:31,321 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:31,470 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [299240#(< i1 N1), 299308#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 299309#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 299307#(or (< (+ i1 1) N1) (<= N1 i1)), 299310#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1))] [2022-03-15 21:33:31,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:33:31,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:33:31,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=2118, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:33:31,471 INFO L87 Difference]: Start difference. First operand 834 states and 2180 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 21:33:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:31,862 INFO L93 Difference]: Finished difference Result 1022 states and 2466 transitions. [2022-03-15 21:33:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:33:31,862 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 23 [2022-03-15 21:33:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:31,863 INFO L225 Difference]: With dead ends: 1022 [2022-03-15 21:33:31,864 INFO L226 Difference]: Without dead ends: 1022 [2022-03-15 21:33:31,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=916, Invalid=3640, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:33:31,864 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 133 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:31,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 0 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-03-15 21:33:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 844. [2022-03-15 21:33:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.6215895610913407) internal successors, (2210), 843 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2210 transitions. [2022-03-15 21:33:31,873 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2210 transitions. Word has length 23 [2022-03-15 21:33:31,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:31,873 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 2210 transitions. [2022-03-15 21:33:31,873 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 21:33:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2210 transitions. [2022-03-15 21:33:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:31,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:31,874 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:31,889 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 21:33:32,074 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 21:33:32,074 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:32,075 INFO L85 PathProgramCache]: Analyzing trace with hash 286834444, now seen corresponding path program 209 times [2022-03-15 21:33:32,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:32,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734192068] [2022-03-15 21:33:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:32,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:32,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:32,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734192068] [2022-03-15 21:33:32,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734192068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:32,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981928667] [2022-03-15 21:33:32,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:32,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:32,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:32,163 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 21:33:32,164 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 21:33:32,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:33:32,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:32,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:32,470 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 21:33:32,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:32,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981928667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:32,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:32,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 41 [2022-03-15 21:33:32,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1183514914] [2022-03-15 21:33:32,767 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:32,768 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:32,772 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2022-03-15 21:33:32,772 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:32,813 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [302229#(< i1 N1)] [2022-03-15 21:33:32,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:33:32,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:32,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:33:32,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1374, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:33:32,813 INFO L87 Difference]: Start difference. First operand 844 states and 2210 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 21:33:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:33,105 INFO L93 Difference]: Finished difference Result 1105 states and 2666 transitions. [2022-03-15 21:33:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:33:33,105 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 23 [2022-03-15 21:33:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:33,107 INFO L225 Difference]: With dead ends: 1105 [2022-03-15 21:33:33,107 INFO L226 Difference]: Without dead ends: 1101 [2022-03-15 21:33:33,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=900, Invalid=2640, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:33:33,108 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:33,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-03-15 21:33:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 863. [2022-03-15 21:33:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.62877030162413) internal successors, (2266), 862 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2266 transitions. [2022-03-15 21:33:33,119 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2266 transitions. Word has length 23 [2022-03-15 21:33:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:33,119 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 2266 transitions. [2022-03-15 21:33:33,119 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 21:33:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2266 transitions. [2022-03-15 21:33:33,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:33,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:33,120 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:33,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-03-15 21:33:33,320 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 21:33:33,321 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:33,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash 347578293, now seen corresponding path program 210 times [2022-03-15 21:33:33,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:33,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669595745] [2022-03-15 21:33:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:33,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:33,425 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 21:33:33,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:33,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669595745] [2022-03-15 21:33:33,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669595745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:33,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546999547] [2022-03-15 21:33:33,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:33,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:33,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:33,426 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 21:33:33,427 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 21:33:33,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:33:33,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:33,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:33,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:33,749 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 21:33:33,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:34,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546999547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:34,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:34,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 42 [2022-03-15 21:33:34,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1015406299] [2022-03-15 21:33:34,072 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:34,073 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:34,078 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:33:34,078 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:34,280 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [305274#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 305270#(< i1 N1), 305272#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 305273#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 305271#(or (< (+ i1 1) N1) (<= N1 i1)), 305276#(or (<= N1 (+ 5 i1)) (< (+ 6 i1) N1)), 305275#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1))] [2022-03-15 21:33:34,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:33:34,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:33:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2019, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:33:34,281 INFO L87 Difference]: Start difference. First operand 863 states and 2266 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 21:33:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:35,560 INFO L93 Difference]: Finished difference Result 1262 states and 2905 transitions. [2022-03-15 21:33:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 21:33:35,560 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 23 [2022-03-15 21:33:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:35,562 INFO L225 Difference]: With dead ends: 1262 [2022-03-15 21:33:35,562 INFO L226 Difference]: Without dead ends: 1251 [2022-03-15 21:33:35,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1790, Invalid=6952, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 21:33:35,563 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 161 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:35,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 0 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-03-15 21:33:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 886. [2022-03-15 21:33:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.615819209039548) internal successors, (2315), 885 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2315 transitions. [2022-03-15 21:33:35,573 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2315 transitions. Word has length 23 [2022-03-15 21:33:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:35,573 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 2315 transitions. [2022-03-15 21:33:35,573 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 21:33:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2315 transitions. [2022-03-15 21:33:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:35,574 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:35,574 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:35,589 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 21:33:35,774 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 21:33:35,774 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1235081974, now seen corresponding path program 211 times [2022-03-15 21:33:35,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:35,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241204139] [2022-03-15 21:33:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:35,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:35,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:35,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241204139] [2022-03-15 21:33:35,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241204139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:35,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469097289] [2022-03-15 21:33:35,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:35,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:35,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:35,874 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 21:33:35,875 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 21:33:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:35,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:35,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:36,179 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 21:33:36,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:36,497 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 21:33:36,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469097289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:36,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:36,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 43 [2022-03-15 21:33:36,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [450098833] [2022-03-15 21:33:36,497 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:36,498 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:36,502 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2022-03-15 21:33:36,503 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:36,550 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [308508#(< i1 N1), 308575#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:36,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:33:36,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:36,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:33:36,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:33:36,551 INFO L87 Difference]: Start difference. First operand 886 states and 2315 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 21:33:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:36,810 INFO L93 Difference]: Finished difference Result 1194 states and 2845 transitions. [2022-03-15 21:33:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:33:36,810 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 23 [2022-03-15 21:33:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:36,812 INFO L225 Difference]: With dead ends: 1194 [2022-03-15 21:33:36,812 INFO L226 Difference]: Without dead ends: 1192 [2022-03-15 21:33:36,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:33:36,812 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:36,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-03-15 21:33:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 892. [2022-03-15 21:33:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.6150392817059482) internal successors, (2330), 891 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2330 transitions. [2022-03-15 21:33:36,822 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2330 transitions. Word has length 23 [2022-03-15 21:33:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:36,822 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 2330 transitions. [2022-03-15 21:33:36,822 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 21:33:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2330 transitions. [2022-03-15 21:33:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:36,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:36,823 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:36,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-15 21:33:37,023 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 21:33:37,023 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:37,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:37,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2090388628, now seen corresponding path program 212 times [2022-03-15 21:33:37,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:37,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061629697] [2022-03-15 21:33:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 39 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:37,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:37,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061629697] [2022-03-15 21:33:37,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061629697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:37,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115750428] [2022-03-15 21:33:37,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:37,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:37,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:37,131 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 21:33:37,131 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 21:33:37,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:37,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:37,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:37,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:37,439 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 21:33:37,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:37,761 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 21:33:37,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115750428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:37,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:37,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 44 [2022-03-15 21:33:37,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1198848708] [2022-03-15 21:33:37,761 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:37,762 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:37,767 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2022-03-15 21:33:37,767 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:37,843 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [311757#(or (< (+ i1 1) N1) (<= N1 i1)), 311690#(< i1 N1), 311758#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:33:37,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:33:37,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:37,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:33:37,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1782, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:33:37,843 INFO L87 Difference]: Start difference. First operand 892 states and 2330 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:38,174 INFO L93 Difference]: Finished difference Result 1192 states and 2846 transitions. [2022-03-15 21:33:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:33:38,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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 21:33:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:38,176 INFO L225 Difference]: With dead ends: 1192 [2022-03-15 21:33:38,176 INFO L226 Difference]: Without dead ends: 1189 [2022-03-15 21:33:38,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=760, Invalid=3146, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:33:38,177 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 109 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:38,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 0 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-03-15 21:33:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 898. [2022-03-15 21:33:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.6142697881828316) internal successors, (2345), 897 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2345 transitions. [2022-03-15 21:33:38,186 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2345 transitions. Word has length 23 [2022-03-15 21:33:38,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:38,186 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 2345 transitions. [2022-03-15 21:33:38,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:38,187 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2345 transitions. [2022-03-15 21:33:38,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:38,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:38,187 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:38,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-03-15 21:33:38,388 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 21:33:38,388 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1459876170, now seen corresponding path program 213 times [2022-03-15 21:33:38,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:38,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499711615] [2022-03-15 21:33:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:38,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:38,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:38,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499711615] [2022-03-15 21:33:38,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499711615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:38,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447716632] [2022-03-15 21:33:38,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:38,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:38,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:38,516 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 21:33:38,516 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 21:33:38,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:33:38,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:38,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:38,829 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 21:33:38,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:39,145 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 21:33:39,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447716632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:39,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:39,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 45 [2022-03-15 21:33:39,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2129860288] [2022-03-15 21:33:39,145 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:39,147 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:39,151 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 37 transitions. [2022-03-15 21:33:39,151 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:39,259 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [314958#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 314957#(or (< (+ i1 1) N1) (<= N1 i1)), 314890#(< i1 N1), 314959#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:33:39,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:33:39,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:39,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:33:39,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:33:39,259 INFO L87 Difference]: Start difference. First operand 898 states and 2345 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:39,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:39,629 INFO L93 Difference]: Finished difference Result 1138 states and 2738 transitions. [2022-03-15 21:33:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:33:39,629 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:33:39,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:39,631 INFO L225 Difference]: With dead ends: 1138 [2022-03-15 21:33:39,631 INFO L226 Difference]: Without dead ends: 1134 [2022-03-15 21:33:39,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=788, Invalid=3372, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:33:39,631 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:39,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-03-15 21:33:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 890. [2022-03-15 21:33:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.6175478065241844) internal successors, (2327), 889 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2327 transitions. [2022-03-15 21:33:39,641 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2327 transitions. Word has length 23 [2022-03-15 21:33:39,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:39,641 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2327 transitions. [2022-03-15 21:33:39,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:39,641 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2327 transitions. [2022-03-15 21:33:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:39,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:39,642 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:39,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-03-15 21:33:39,842 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 21:33:39,842 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:39,843 INFO L85 PathProgramCache]: Analyzing trace with hash 151064788, now seen corresponding path program 214 times [2022-03-15 21:33:39,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:39,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756894619] [2022-03-15 21:33:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:39,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:39,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:39,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756894619] [2022-03-15 21:33:39,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756894619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:39,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350802305] [2022-03-15 21:33:39,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:39,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:39,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:39,969 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 21:33:39,970 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 21:33:39,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:39,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:39,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:39,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:40,288 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 21:33:40,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:40,599 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 21:33:40,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350802305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:40,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:40,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 46 [2022-03-15 21:33:40,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [407820054] [2022-03-15 21:33:40,599 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:40,600 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:40,604 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:33:40,604 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:40,744 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [318022#(< i1 N1), 318091#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 318092#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 318089#(or (< (+ i1 1) N1) (<= N1 i1)), 318090#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:33:40,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:33:40,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:33:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2146, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:33:40,745 INFO L87 Difference]: Start difference. First operand 890 states and 2327 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:41,061 INFO L93 Difference]: Finished difference Result 1014 states and 2485 transitions. [2022-03-15 21:33:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:33:41,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:33:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:41,062 INFO L225 Difference]: With dead ends: 1014 [2022-03-15 21:33:41,062 INFO L226 Difference]: Without dead ends: 1014 [2022-03-15 21:33:41,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=3287, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:33:41,063 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 109 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:41,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 0 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-03-15 21:33:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 850. [2022-03-15 21:33:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.6230859835100118) internal successors, (2227), 849 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2227 transitions. [2022-03-15 21:33:41,072 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2227 transitions. Word has length 23 [2022-03-15 21:33:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:41,072 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 2227 transitions. [2022-03-15 21:33:41,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2227 transitions. [2022-03-15 21:33:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:41,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:41,073 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:41,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-15 21:33:41,273 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 21:33:41,273 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1449373066, now seen corresponding path program 215 times [2022-03-15 21:33:41,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:41,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812143514] [2022-03-15 21:33:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:41,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:41,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:41,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812143514] [2022-03-15 21:33:41,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812143514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:41,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073744717] [2022-03-15 21:33:41,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:41,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:41,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:41,408 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 21:33:41,409 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 21:33:41,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:33:41,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:41,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:41,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:41,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:42,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073744717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:42,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:42,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 47 [2022-03-15 21:33:42,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1384913318] [2022-03-15 21:33:42,053 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:42,054 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:42,058 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:33:42,058 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:42,231 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [321016#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 321017#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 320946#(< i1 N1), 321014#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 321013#(or (< (+ i1 1) N1) (<= N1 i1)), 321015#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:33:42,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:33:42,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:33:42,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=2301, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:33:42,232 INFO L87 Difference]: Start difference. First operand 850 states and 2227 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:42,668 INFO L93 Difference]: Finished difference Result 1004 states and 2451 transitions. [2022-03-15 21:33:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:33:42,668 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:33:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:42,669 INFO L225 Difference]: With dead ends: 1004 [2022-03-15 21:33:42,669 INFO L226 Difference]: Without dead ends: 1004 [2022-03-15 21:33:42,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1036, Invalid=4076, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:33:42,670 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 131 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:42,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 0 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-03-15 21:33:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 862. [2022-03-15 21:33:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.6283391405342624) internal successors, (2263), 861 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2263 transitions. [2022-03-15 21:33:42,679 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2263 transitions. Word has length 23 [2022-03-15 21:33:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:42,679 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2263 transitions. [2022-03-15 21:33:42,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2263 transitions. [2022-03-15 21:33:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:42,680 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:42,680 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:42,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-03-15 21:33:42,880 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 21:33:42,880 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:42,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:42,880 INFO L85 PathProgramCache]: Analyzing trace with hash -686720146, now seen corresponding path program 216 times [2022-03-15 21:33:42,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:42,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129400929] [2022-03-15 21:33:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:42,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:42,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:42,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129400929] [2022-03-15 21:33:42,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129400929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:42,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013459298] [2022-03-15 21:33:42,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:42,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:42,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:42,973 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 21:33:42,974 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 21:33:43,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:33:43,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:43,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:43,281 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 21:33:43,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:43,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013459298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:43,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:43,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 41 [2022-03-15 21:33:43,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1034002249] [2022-03-15 21:33:43,577 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:43,579 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:43,583 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2022-03-15 21:33:43,583 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:43,613 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [323958#(< i1 N1)] [2022-03-15 21:33:43,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:33:43,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:43,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:33:43,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1365, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:33:43,614 INFO L87 Difference]: Start difference. First operand 862 states and 2263 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 21:33:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:43,945 INFO L93 Difference]: Finished difference Result 1071 states and 2627 transitions. [2022-03-15 21:33:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:33:43,945 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 23 [2022-03-15 21:33:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:43,947 INFO L225 Difference]: With dead ends: 1071 [2022-03-15 21:33:43,947 INFO L226 Difference]: Without dead ends: 1067 [2022-03-15 21:33:43,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:33:43,948 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:43,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-03-15 21:33:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 859. [2022-03-15 21:33:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.621212121212121) internal successors, (2249), 858 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 21:33:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2249 transitions. [2022-03-15 21:33:43,958 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2249 transitions. Word has length 23 [2022-03-15 21:33:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:43,958 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 2249 transitions. [2022-03-15 21:33:43,958 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 21:33:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2249 transitions. [2022-03-15 21:33:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:43,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:43,959 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:43,974 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 21:33:44,159 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 21:33:44,159 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:44,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:44,159 INFO L85 PathProgramCache]: Analyzing trace with hash -625976297, now seen corresponding path program 217 times [2022-03-15 21:33:44,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:44,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712508280] [2022-03-15 21:33:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:44,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:44,260 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 21:33:44,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:44,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712508280] [2022-03-15 21:33:44,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712508280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:44,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646603677] [2022-03-15 21:33:44,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:44,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:44,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:44,262 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 21:33:44,262 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 21:33:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:44,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:44,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:44,574 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 21:33:44,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:44,910 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 21:33:44,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646603677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:44,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:44,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 42 [2022-03-15 21:33:44,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1803956666] [2022-03-15 21:33:44,911 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:44,912 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:44,925 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:33:44,925 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:45,147 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [326966#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 326963#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 326968#(or (< (+ 7 i1) N1) (<= N1 (+ 6 i1))), 326961#(< i1 N1), 326967#(or (<= N1 (+ 5 i1)) (< (+ 6 i1) N1)), 326965#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 326964#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 326962#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:45,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:33:45,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:45,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:33:45,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:33:45,148 INFO L87 Difference]: Start difference. First operand 859 states and 2249 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 21:33:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:46,495 INFO L93 Difference]: Finished difference Result 1252 states and 2859 transitions. [2022-03-15 21:33:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 21:33:46,495 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 23 [2022-03-15 21:33:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:46,503 INFO L225 Difference]: With dead ends: 1252 [2022-03-15 21:33:46,503 INFO L226 Difference]: Without dead ends: 1239 [2022-03-15 21:33:46,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1800, Invalid=7130, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 21:33:46,503 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:46,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-03-15 21:33:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 881. [2022-03-15 21:33:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.598863636363636) internal successors, (2287), 880 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2287 transitions. [2022-03-15 21:33:46,513 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2287 transitions. Word has length 23 [2022-03-15 21:33:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:46,513 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 2287 transitions. [2022-03-15 21:33:46,513 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 21:33:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2287 transitions. [2022-03-15 21:33:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:46,514 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:46,514 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:46,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-03-15 21:33:46,714 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 21:33:46,714 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 261527384, now seen corresponding path program 218 times [2022-03-15 21:33:46,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:46,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660129521] [2022-03-15 21:33:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:46,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:46,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660129521] [2022-03-15 21:33:46,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660129521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:46,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006153661] [2022-03-15 21:33:46,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:46,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:46,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:46,817 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 21:33:46,817 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 21:33:46,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:46,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:46,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:47,122 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 21:33:47,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:47,436 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 21:33:47,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006153661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:47,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:47,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 43 [2022-03-15 21:33:47,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [603588945] [2022-03-15 21:33:47,436 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:47,437 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:47,441 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 31 transitions. [2022-03-15 21:33:47,441 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:47,479 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [330180#(< i1 N1), 330247#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:47,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:33:47,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:47,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:33:47,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1588, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:33:47,480 INFO L87 Difference]: Start difference. First operand 881 states and 2287 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 21:33:47,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:47,748 INFO L93 Difference]: Finished difference Result 1129 states and 2689 transitions. [2022-03-15 21:33:47,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:33:47,748 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 23 [2022-03-15 21:33:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:47,749 INFO L225 Difference]: With dead ends: 1129 [2022-03-15 21:33:47,749 INFO L226 Difference]: Without dead ends: 1127 [2022-03-15 21:33:47,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=707, Invalid=2715, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:33:47,750 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:47,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-03-15 21:33:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 883. [2022-03-15 21:33:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 2.598639455782313) internal successors, (2292), 882 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 2292 transitions. [2022-03-15 21:33:47,759 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 2292 transitions. Word has length 23 [2022-03-15 21:33:47,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:47,759 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 2292 transitions. [2022-03-15 21:33:47,759 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 21:33:47,760 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 2292 transitions. [2022-03-15 21:33:47,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:47,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:47,760 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:47,776 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 21:33:47,961 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 21:33:47,961 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:47,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:47,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1116834038, now seen corresponding path program 219 times [2022-03-15 21:33:47,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:47,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268487027] [2022-03-15 21:33:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:47,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:48,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:48,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268487027] [2022-03-15 21:33:48,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268487027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:48,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447528238] [2022-03-15 21:33:48,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:48,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:48,072 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 21:33:48,072 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 21:33:48,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:33:48,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:48,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:48,385 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 21:33:48,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:48,698 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 21:33:48,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447528238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:48,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:48,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 44 [2022-03-15 21:33:48,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1441439110] [2022-03-15 21:33:48,699 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:48,700 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:48,704 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2022-03-15 21:33:48,704 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:48,772 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [333348#(or (< (+ i1 1) N1) (<= N1 i1)), 333349#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 333281#(< i1 N1)] [2022-03-15 21:33:48,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:33:48,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:48,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:33:48,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:33:48,773 INFO L87 Difference]: Start difference. First operand 883 states and 2292 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 21:33:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:49,125 INFO L93 Difference]: Finished difference Result 1141 states and 2714 transitions. [2022-03-15 21:33:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:33:49,125 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 23 [2022-03-15 21:33:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:49,126 INFO L225 Difference]: With dead ends: 1141 [2022-03-15 21:33:49,126 INFO L226 Difference]: Without dead ends: 1138 [2022-03-15 21:33:49,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=815, Invalid=3345, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:33:49,127 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:49,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-03-15 21:33:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 885. [2022-03-15 21:33:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.5984162895927603) internal successors, (2297), 884 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2297 transitions. [2022-03-15 21:33:49,138 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2297 transitions. Word has length 23 [2022-03-15 21:33:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:49,138 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 2297 transitions. [2022-03-15 21:33:49,138 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 21:33:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2297 transitions. [2022-03-15 21:33:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:49,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:49,139 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:49,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-15 21:33:49,340 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 21:33:49,340 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:49,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1861536536, now seen corresponding path program 220 times [2022-03-15 21:33:49,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:49,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823895704] [2022-03-15 21:33:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:49,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:49,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:49,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823895704] [2022-03-15 21:33:49,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823895704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:49,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457898258] [2022-03-15 21:33:49,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:49,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:49,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:49,469 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 21:33:49,470 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 21:33:49,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:49,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:49,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:49,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:49,790 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 21:33:49,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:50,111 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 21:33:50,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457898258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:50,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:50,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 45 [2022-03-15 21:33:50,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1566646694] [2022-03-15 21:33:50,111 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:50,112 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:50,117 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2022-03-15 21:33:50,117 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:50,215 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [336476#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 336477#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 336475#(or (< (+ i1 1) N1) (<= N1 i1)), 336408#(< i1 N1)] [2022-03-15 21:33:50,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:33:50,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:33:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:33:50,215 INFO L87 Difference]: Start difference. First operand 885 states and 2297 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:50,602 INFO L93 Difference]: Finished difference Result 1122 states and 2678 transitions. [2022-03-15 21:33:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:33:50,602 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 23 [2022-03-15 21:33:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:50,604 INFO L225 Difference]: With dead ends: 1122 [2022-03-15 21:33:50,604 INFO L226 Difference]: Without dead ends: 1118 [2022-03-15 21:33:50,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=873, Invalid=3683, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:33:50,604 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 119 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:50,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 0 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-03-15 21:33:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 887. [2022-03-15 21:33:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.598194130925508) internal successors, (2302), 886 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2302 transitions. [2022-03-15 21:33:50,613 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2302 transitions. Word has length 23 [2022-03-15 21:33:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:50,614 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2302 transitions. [2022-03-15 21:33:50,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2302 transitions. [2022-03-15 21:33:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:50,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:50,614 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:50,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:50,815 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 21:33:50,815 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash -822489802, now seen corresponding path program 221 times [2022-03-15 21:33:50,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:50,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315257633] [2022-03-15 21:33:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:50,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:50,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:50,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315257633] [2022-03-15 21:33:50,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315257633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:50,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862818384] [2022-03-15 21:33:50,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:50,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:50,944 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 21:33:50,945 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 21:33:50,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:33:50,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:50,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:50,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:51,261 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 21:33:51,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:51,583 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 21:33:51,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862818384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:51,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:51,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 46 [2022-03-15 21:33:51,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [22389393] [2022-03-15 21:33:51,583 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:51,584 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:51,588 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 37 transitions. [2022-03-15 21:33:51,588 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:51,718 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [339524#(< i1 N1), 339592#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 339593#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 339594#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 339591#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:51,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:33:51,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:51,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:33:51,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2149, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:33:51,719 INFO L87 Difference]: Start difference. First operand 887 states and 2302 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:52,116 INFO L93 Difference]: Finished difference Result 1075 states and 2589 transitions. [2022-03-15 21:33:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:33:52,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:33:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:52,118 INFO L225 Difference]: With dead ends: 1075 [2022-03-15 21:33:52,118 INFO L226 Difference]: Without dead ends: 1070 [2022-03-15 21:33:52,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=885, Invalid=3807, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:33:52,118 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:52,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-15 21:33:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 880. [2022-03-15 21:33:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 2.601820250284414) internal successors, (2287), 879 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2287 transitions. [2022-03-15 21:33:52,127 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2287 transitions. Word has length 23 [2022-03-15 21:33:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:52,127 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 2287 transitions. [2022-03-15 21:33:52,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2287 transitions. [2022-03-15 21:33:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:52,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:52,129 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:52,146 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 21:33:52,335 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 21:33:52,335 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1872039640, now seen corresponding path program 222 times [2022-03-15 21:33:52,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:52,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514052770] [2022-03-15 21:33:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:52,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:52,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514052770] [2022-03-15 21:33:52,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514052770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:52,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159844560] [2022-03-15 21:33:52,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:52,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:52,474 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 21:33:52,475 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 21:33:52,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:33:52,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:52,833 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 21:33:52,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:53,149 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 21:33:53,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159844560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:53,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:53,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 47 [2022-03-15 21:33:53,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [890072231] [2022-03-15 21:33:53,149 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:53,150 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:53,163 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:33:53,163 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:53,328 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [342646#(or (< (+ i1 1) N1) (<= N1 i1)), 342648#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 342579#(< i1 N1), 342647#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 342649#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 342650#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1))] [2022-03-15 21:33:53,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:33:53,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:53,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:33:53,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2328, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:33:53,328 INFO L87 Difference]: Start difference. First operand 880 states and 2287 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:53,672 INFO L93 Difference]: Finished difference Result 974 states and 2401 transitions. [2022-03-15 21:33:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:33:53,673 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 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 21:33:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:53,674 INFO L225 Difference]: With dead ends: 974 [2022-03-15 21:33:53,674 INFO L226 Difference]: Without dead ends: 974 [2022-03-15 21:33:53,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=824, Invalid=3598, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:33:53,675 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:53,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-03-15 21:33:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 843. [2022-03-15 21:33:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.6282660332541568) internal successors, (2213), 842 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2213 transitions. [2022-03-15 21:33:53,683 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2213 transitions. Word has length 23 [2022-03-15 21:33:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:53,683 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 2213 transitions. [2022-03-15 21:33:53,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:53,683 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2213 transitions. [2022-03-15 21:33:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:53,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:53,684 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:53,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-03-15 21:33:53,884 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 21:33:53,885 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:53,885 INFO L85 PathProgramCache]: Analyzing trace with hash -496893578, now seen corresponding path program 223 times [2022-03-15 21:33:53,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:53,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61732438] [2022-03-15 21:33:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:53,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:54,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:54,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61732438] [2022-03-15 21:33:54,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61732438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:54,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739242878] [2022-03-15 21:33:54,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:54,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:54,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:54,034 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 21:33:54,035 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 21:33:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:54,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:54,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:54,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:54,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739242878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:54,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:54,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 48 [2022-03-15 21:33:54,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1667650654] [2022-03-15 21:33:54,685 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:54,686 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:54,690 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:33:54,691 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:54,904 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [345453#(< i1 N1), 345522#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 345525#(or (<= N1 (+ 5 i1)) (< (+ 6 i1) N1)), 345524#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 345523#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 345521#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 345520#(or (< (+ i1 1) N1) (<= N1 i1))] [2022-03-15 21:33:54,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:33:54,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:54,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:33:54,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=2482, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:33:54,904 INFO L87 Difference]: Start difference. First operand 843 states and 2213 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 21:33:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:55,365 INFO L93 Difference]: Finished difference Result 958 states and 2365 transitions. [2022-03-15 21:33:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:33:55,366 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 21:33:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:55,367 INFO L225 Difference]: With dead ends: 958 [2022-03-15 21:33:55,367 INFO L226 Difference]: Without dead ends: 958 [2022-03-15 21:33:55,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1172, Invalid=4528, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:33:55,368 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 119 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:55,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 0 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-03-15 21:33:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 829. [2022-03-15 21:33:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 2.619565217391304) internal successors, (2169), 828 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2169 transitions. [2022-03-15 21:33:55,376 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2169 transitions. Word has length 23 [2022-03-15 21:33:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:55,376 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 2169 transitions. [2022-03-15 21:33:55,376 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 21:33:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2169 transitions. [2022-03-15 21:33:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:55,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:55,377 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:55,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-15 21:33:55,577 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 21:33:55,578 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:55,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:55,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1846940428, now seen corresponding path program 224 times [2022-03-15 21:33:55,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:55,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702512422] [2022-03-15 21:33:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:55,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:55,700 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 21:33:55,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:55,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702512422] [2022-03-15 21:33:55,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702512422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:55,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925970097] [2022-03-15 21:33:55,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:55,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:55,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:55,702 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 21:33:55,702 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 21:33:55,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:55,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:56,030 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 21:33:56,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:56,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925970097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:56,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:56,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 41 [2022-03-15 21:33:56,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1738262237] [2022-03-15 21:33:56,219 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:56,221 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:56,226 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 55 transitions. [2022-03-15 21:33:56,226 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:56,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [348364#(or (< i1 N1) (<= N2 (+ 5 i2))), 348362#(or (<= N2 (+ 3 i2)) (< i1 N1)), 348363#(or (< i1 N1) (<= N2 (+ i2 4))), 348359#(or (<= N2 i2) (< i1 N1)), 348358#(< i1 N1), 348360#(or (<= N2 (+ i2 1)) (< i1 N1)), 348361#(or (< i1 N1) (<= N2 (+ 2 i2)))] [2022-03-15 21:33:56,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:33:56,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:56,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:33:56,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=1761, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:33:56,483 INFO L87 Difference]: Start difference. First operand 829 states and 2169 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 21:33:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:56,821 INFO L93 Difference]: Finished difference Result 1015 states and 2459 transitions. [2022-03-15 21:33:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:33:56,821 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 23 [2022-03-15 21:33:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:56,822 INFO L225 Difference]: With dead ends: 1015 [2022-03-15 21:33:56,823 INFO L226 Difference]: Without dead ends: 1001 [2022-03-15 21:33:56,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1046, Invalid=2986, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:33:56,823 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 119 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:56,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 0 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-03-15 21:33:56,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 767. [2022-03-15 21:33:56,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.6383812010443863) internal successors, (2021), 766 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2021 transitions. [2022-03-15 21:33:56,831 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2021 transitions. Word has length 23 [2022-03-15 21:33:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:56,831 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 2021 transitions. [2022-03-15 21:33:56,831 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 21:33:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2021 transitions. [2022-03-15 21:33:56,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:56,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:56,832 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:56,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-15 21:33:57,032 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 21:33:57,033 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash 587862261, now seen corresponding path program 225 times [2022-03-15 21:33:57,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:57,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371856322] [2022-03-15 21:33:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:57,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:57,172 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 21:33:57,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:57,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371856322] [2022-03-15 21:33:57,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371856322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:57,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993879845] [2022-03-15 21:33:57,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:57,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:57,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:57,174 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 21:33:57,174 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 21:33:57,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:33:57,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:57,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:57,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:57,494 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 21:33:57,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:57,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993879845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:57,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:57,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2022-03-15 21:33:57,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [829730074] [2022-03-15 21:33:57,685 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:57,687 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:57,692 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 51 transitions. [2022-03-15 21:33:57,692 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:57,954 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [351121#(or (< i1 N1) (<= (+ 2 i2) N2)), 351123#(or (<= (+ i2 4) N2) (< i1 N1)), 351124#(or (< i1 N1) (<= (+ 5 i2) N2)), 351119#(< i1 N1), 351125#(or (< i1 N1) (<= (+ 6 i2) N2)), 351120#(or (< i2 N2) (< i1 N1)), 351122#(or (< i1 N1) (<= (+ 3 i2) N2))] [2022-03-15 21:33:57,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:33:57,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:57,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:33:57,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1996, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:33:57,955 INFO L87 Difference]: Start difference. First operand 767 states and 2021 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:58,256 INFO L93 Difference]: Finished difference Result 931 states and 2258 transitions. [2022-03-15 21:33:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:33:58,256 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:33:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:58,257 INFO L225 Difference]: With dead ends: 931 [2022-03-15 21:33:58,258 INFO L226 Difference]: Without dead ends: 903 [2022-03-15 21:33:58,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=805, Invalid=3101, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:33:58,258 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:58,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-03-15 21:33:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 759. [2022-03-15 21:33:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.612137203166227) internal successors, (1980), 758 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1980 transitions. [2022-03-15 21:33:58,265 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1980 transitions. Word has length 23 [2022-03-15 21:33:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:58,266 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1980 transitions. [2022-03-15 21:33:58,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1980 transitions. [2022-03-15 21:33:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:58,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:58,266 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:58,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:58,466 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 21:33:58,467 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:58,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash -256609610, now seen corresponding path program 226 times [2022-03-15 21:33:58,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:58,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610974427] [2022-03-15 21:33:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:58,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:58,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:58,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610974427] [2022-03-15 21:33:58,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610974427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:58,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885054091] [2022-03-15 21:33:58,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:58,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:58,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:58,581 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 21:33:58,582 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 21:33:58,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:58,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:58,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:33:58,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:58,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:59,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885054091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:59,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:59,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 41 [2022-03-15 21:33:59,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2012547234] [2022-03-15 21:33:59,105 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:59,106 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:59,111 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 51 transitions. [2022-03-15 21:33:59,111 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:59,319 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [353775#(< i1 N1), 353777#(or (<= N2 (+ i2 1)) (< i1 N1)), 353778#(or (< i1 N1) (<= N2 (+ 2 i2))), 353779#(or (<= N2 (+ 3 i2)) (< i1 N1)), 353780#(or (< i1 N1) (<= N2 (+ i2 4))), 353776#(or (<= N2 i2) (< i1 N1))] [2022-03-15 21:33:59,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:33:59,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:59,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:33:59,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1693, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:33:59,320 INFO L87 Difference]: Start difference. First operand 759 states and 1980 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 21:33:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:59,667 INFO L93 Difference]: Finished difference Result 947 states and 2287 transitions. [2022-03-15 21:33:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:33:59,667 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 23 [2022-03-15 21:33:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:59,668 INFO L225 Difference]: With dead ends: 947 [2022-03-15 21:33:59,668 INFO L226 Difference]: Without dead ends: 935 [2022-03-15 21:33:59,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1050, Invalid=2982, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:33:59,668 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:59,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:59,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-03-15 21:33:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 705. [2022-03-15 21:33:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.6264204545454546) internal successors, (1849), 704 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1849 transitions. [2022-03-15 21:33:59,676 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1849 transitions. Word has length 23 [2022-03-15 21:33:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:59,676 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1849 transitions. [2022-03-15 21:33:59,676 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 21:33:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1849 transitions. [2022-03-15 21:33:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:33:59,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:59,677 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:59,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:59,878 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 21:33:59,878 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:59,878 INFO L85 PathProgramCache]: Analyzing trace with hash -574319699, now seen corresponding path program 227 times [2022-03-15 21:33:59,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:59,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651975789] [2022-03-15 21:33:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:59,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:00,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:00,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651975789] [2022-03-15 21:34:00,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651975789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:00,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981982797] [2022-03-15 21:34:00,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:34:00,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:00,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:00,005 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 21:34:00,006 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 21:34:00,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:34:00,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:00,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:00,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:00,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981982797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:00,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:00,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-03-15 21:34:00,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [898425041] [2022-03-15 21:34:00,541 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:00,542 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:00,546 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 47 transitions. [2022-03-15 21:34:00,546 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:00,768 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [356345#(< i1 N1), 356346#(or (< i2 N2) (< i1 N1)), 356350#(or (< i1 N1) (<= (+ 5 i2) N2)), 356349#(or (<= (+ i2 4) N2) (< i1 N1)), 356347#(or (< i1 N1) (<= (+ 2 i2) N2)), 356348#(or (< i1 N1) (<= (+ 3 i2) N2))] [2022-03-15 21:34:00,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:34:00,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:34:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1920, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:34:00,769 INFO L87 Difference]: Start difference. First operand 705 states and 1849 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 21:34:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:01,028 INFO L93 Difference]: Finished difference Result 906 states and 2146 transitions. [2022-03-15 21:34:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:34:01,028 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 23 [2022-03-15 21:34:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:01,029 INFO L225 Difference]: With dead ends: 906 [2022-03-15 21:34:01,030 INFO L226 Difference]: Without dead ends: 884 [2022-03-15 21:34:01,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=729, Invalid=2811, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:34:01,030 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:01,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-03-15 21:34:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 699. [2022-03-15 21:34:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.603151862464183) internal successors, (1817), 698 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1817 transitions. [2022-03-15 21:34:01,037 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1817 transitions. Word has length 23 [2022-03-15 21:34:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:01,037 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 1817 transitions. [2022-03-15 21:34:01,037 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 21:34:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1817 transitions. [2022-03-15 21:34:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:01,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:01,038 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:01,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-15 21:34:01,238 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 21:34:01,239 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:01,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1571392052, now seen corresponding path program 228 times [2022-03-15 21:34:01,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:01,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137594005] [2022-03-15 21:34:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:01,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:01,345 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 21:34:01,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:01,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137594005] [2022-03-15 21:34:01,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137594005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:01,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522593061] [2022-03-15 21:34:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:34:01,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:01,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:01,347 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 21:34:01,347 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 21:34:01,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:34:01,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:01,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:01,681 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 21:34:01,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:01,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522593061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:01,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:01,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 41 [2022-03-15 21:34:01,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [43472601] [2022-03-15 21:34:01,896 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:01,897 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:01,902 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 47 transitions. [2022-03-15 21:34:01,902 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:02,067 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [358853#(or (<= N2 (+ i2 1)) (< i1 N1)), 358854#(or (< i1 N1) (<= N2 (+ 2 i2))), 358851#(< i1 N1), 358855#(or (<= N2 (+ 3 i2)) (< i1 N1)), 358852#(or (<= N2 i2) (< i1 N1))] [2022-03-15 21:34:02,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:34:02,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:34:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=1625, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:34:02,068 INFO L87 Difference]: Start difference. First operand 699 states and 1817 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 21:34:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:02,376 INFO L93 Difference]: Finished difference Result 883 states and 2125 transitions. [2022-03-15 21:34:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:34:02,377 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 23 [2022-03-15 21:34:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:02,378 INFO L225 Difference]: With dead ends: 883 [2022-03-15 21:34:02,378 INFO L226 Difference]: Without dead ends: 873 [2022-03-15 21:34:02,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1051, Invalid=2981, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:34:02,378 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:02,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-03-15 21:34:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 653. [2022-03-15 21:34:02,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.611963190184049) internal successors, (1703), 652 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1703 transitions. [2022-03-15 21:34:02,385 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1703 transitions. Word has length 23 [2022-03-15 21:34:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:02,385 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1703 transitions. [2022-03-15 21:34:02,385 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 21:34:02,385 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1703 transitions. [2022-03-15 21:34:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:02,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:02,386 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:02,402 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 21:34:02,586 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 21:34:02,587 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:02,587 INFO L85 PathProgramCache]: Analyzing trace with hash 80927221, now seen corresponding path program 229 times [2022-03-15 21:34:02,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:02,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279746541] [2022-03-15 21:34:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:02,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:02,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:02,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279746541] [2022-03-15 21:34:02,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279746541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:02,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990660205] [2022-03-15 21:34:02,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:34:02,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:02,706 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 21:34:02,707 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 21:34:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:02,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:02,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:03,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:03,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990660205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:03,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:03,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 42 [2022-03-15 21:34:03,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1332626909] [2022-03-15 21:34:03,258 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:03,259 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:03,263 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:34:03,263 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:03,440 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [361256#(or (< i1 N1) (<= (+ 2 i2) N2)), 361258#(or (<= (+ i2 4) N2) (< i1 N1)), 361257#(or (< i1 N1) (<= (+ 3 i2) N2)), 361255#(or (< i2 N2) (< i1 N1)), 361254#(< i1 N1)] [2022-03-15 21:34:03,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:34:03,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:34:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1838, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:34:03,441 INFO L87 Difference]: Start difference. First operand 653 states and 1703 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:03,663 INFO L93 Difference]: Finished difference Result 890 states and 2062 transitions. [2022-03-15 21:34:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:34:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:34:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:03,665 INFO L225 Difference]: With dead ends: 890 [2022-03-15 21:34:03,665 INFO L226 Difference]: Without dead ends: 874 [2022-03-15 21:34:03,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=661, Invalid=2531, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:34:03,665 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:03,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-15 21:34:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 649. [2022-03-15 21:34:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.5925925925925926) internal successors, (1680), 648 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1680 transitions. [2022-03-15 21:34:03,672 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1680 transitions. Word has length 23 [2022-03-15 21:34:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:03,672 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1680 transitions. [2022-03-15 21:34:03,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1680 transitions. [2022-03-15 21:34:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:03,673 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:03,673 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:03,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-03-15 21:34:03,874 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 21:34:03,874 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1434236918, now seen corresponding path program 230 times [2022-03-15 21:34:03,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:03,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322183534] [2022-03-15 21:34:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:03,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:03,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:03,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322183534] [2022-03-15 21:34:03,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322183534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:03,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655316938] [2022-03-15 21:34:03,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:34:03,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:03,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:03,975 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 21:34:03,975 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 21:34:04,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:34:04,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:04,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:04,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:04,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655316938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:04,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:04,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 41 [2022-03-15 21:34:04,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1222245904] [2022-03-15 21:34:04,516 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:04,517 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:04,522 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:34:04,522 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:04,661 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [363640#(or (<= N2 i2) (< i1 N1)), 363642#(or (< i1 N1) (<= N2 (+ 2 i2))), 363639#(< i1 N1), 363641#(or (<= N2 (+ i2 1)) (< i1 N1))] [2022-03-15 21:34:04,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:34:04,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:34:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1557, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:34:04,662 INFO L87 Difference]: Start difference. First operand 649 states and 1680 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 21:34:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:04,968 INFO L93 Difference]: Finished difference Result 818 states and 1962 transitions. [2022-03-15 21:34:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:34:04,968 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 21:34:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:04,969 INFO L225 Difference]: With dead ends: 818 [2022-03-15 21:34:04,969 INFO L226 Difference]: Without dead ends: 810 [2022-03-15 21:34:04,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1049, Invalid=2983, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:34:04,969 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:04,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-03-15 21:34:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 611. [2022-03-15 21:34:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.595081967213115) internal successors, (1583), 610 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1583 transitions. [2022-03-15 21:34:04,976 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1583 transitions. Word has length 23 [2022-03-15 21:34:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:04,976 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1583 transitions. [2022-03-15 21:34:04,976 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 21:34:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1583 transitions. [2022-03-15 21:34:04,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:04,977 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:04,977 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:04,993 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 21:34:05,177 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 21:34:05,177 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:05,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:05,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1421956435, now seen corresponding path program 231 times [2022-03-15 21:34:05,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:05,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297816385] [2022-03-15 21:34:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:05,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:05,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:05,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297816385] [2022-03-15 21:34:05,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297816385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:05,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715277936] [2022-03-15 21:34:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:34:05,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:05,291 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 21:34:05,292 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 21:34:05,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:34:05,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:05,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:05,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:05,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:05,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715277936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:05,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:05,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 42 [2022-03-15 21:34:05,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1392052559] [2022-03-15 21:34:05,884 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:05,885 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:05,890 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:34:05,890 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:06,026 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [365896#(or (< i1 N1) (<= (+ 2 i2) N2)), 365897#(or (< i1 N1) (<= (+ 3 i2) N2)), 365894#(< i1 N1), 365895#(or (< i2 N2) (< i1 N1))] [2022-03-15 21:34:06,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:34:06,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:06,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:34:06,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1750, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:34:06,027 INFO L87 Difference]: Start difference. First operand 611 states and 1583 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 21:34:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:06,213 INFO L93 Difference]: Finished difference Result 881 states and 2002 transitions. [2022-03-15 21:34:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:34:06,214 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 23 [2022-03-15 21:34:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:06,215 INFO L225 Difference]: With dead ends: 881 [2022-03-15 21:34:06,215 INFO L226 Difference]: Without dead ends: 871 [2022-03-15 21:34:06,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=601, Invalid=2261, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:34:06,215 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:06,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-03-15 21:34:06,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 609. [2022-03-15 21:34:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 2.580592105263158) internal successors, (1569), 608 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1569 transitions. [2022-03-15 21:34:06,227 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1569 transitions. Word has length 23 [2022-03-15 21:34:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:06,227 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 1569 transitions. [2022-03-15 21:34:06,227 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 21:34:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1569 transitions. [2022-03-15 21:34:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:06,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:06,228 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:06,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-03-15 21:34:06,428 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 21:34:06,428 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1932490612, now seen corresponding path program 232 times [2022-03-15 21:34:06,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:06,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986533640] [2022-03-15 21:34:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:06,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:06,525 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 21:34:06,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:06,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986533640] [2022-03-15 21:34:06,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986533640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:06,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575951526] [2022-03-15 21:34:06,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:34:06,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:06,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:06,527 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 21:34:06,528 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 21:34:06,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:34:06,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:06,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:06,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:06,845 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 21:34:06,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:07,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575951526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:07,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:07,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 41 [2022-03-15 21:34:07,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [47685873] [2022-03-15 21:34:07,088 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:07,089 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:07,094 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:34:07,094 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:07,186 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [368186#(or (<= N2 i2) (< i1 N1)), 368187#(or (<= N2 (+ i2 1)) (< i1 N1)), 368185#(< i1 N1)] [2022-03-15 21:34:07,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:34:07,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:34:07,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1489, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:34:07,187 INFO L87 Difference]: Start difference. First operand 609 states and 1569 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 21:34:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:07,488 INFO L93 Difference]: Finished difference Result 752 states and 1798 transitions. [2022-03-15 21:34:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:34:07,488 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 23 [2022-03-15 21:34:07,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:07,489 INFO L225 Difference]: With dead ends: 752 [2022-03-15 21:34:07,489 INFO L226 Difference]: Without dead ends: 746 [2022-03-15 21:34:07,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1044, Invalid=2988, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:34:07,490 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:07,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-03-15 21:34:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 599. [2022-03-15 21:34:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.5903010033444818) internal successors, (1549), 598 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1549 transitions. [2022-03-15 21:34:07,496 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1549 transitions. Word has length 23 [2022-03-15 21:34:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:07,496 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1549 transitions. [2022-03-15 21:34:07,496 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 21:34:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1549 transitions. [2022-03-15 21:34:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:07,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:07,497 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:07,512 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 21:34:07,697 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 21:34:07,697 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:07,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:07,698 INFO L85 PathProgramCache]: Analyzing trace with hash 607773429, now seen corresponding path program 233 times [2022-03-15 21:34:07,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:07,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273066861] [2022-03-15 21:34:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:07,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:07,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:07,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273066861] [2022-03-15 21:34:07,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273066861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:07,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436190190] [2022-03-15 21:34:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:34:07,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:07,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:07,807 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 21:34:07,808 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 21:34:07,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:34:07,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:07,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:07,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:08,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:08,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436190190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:08,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:08,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 42 [2022-03-15 21:34:08,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [772996939] [2022-03-15 21:34:08,421 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:08,422 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:08,426 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2022-03-15 21:34:08,427 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:08,521 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [370352#(or (< i2 N2) (< i1 N1)), 370353#(or (< i1 N1) (<= (+ 2 i2) N2)), 370351#(< i1 N1)] [2022-03-15 21:34:08,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:34:08,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:34:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1656, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:34:08,521 INFO L87 Difference]: Start difference. First operand 599 states and 1549 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:08,669 INFO L93 Difference]: Finished difference Result 897 states and 2022 transitions. [2022-03-15 21:34:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:34:08,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:34:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:08,670 INFO L225 Difference]: With dead ends: 897 [2022-03-15 21:34:08,671 INFO L226 Difference]: Without dead ends: 893 [2022-03-15 21:34:08,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=549, Invalid=2001, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:34:08,671 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:08,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-03-15 21:34:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 599. [2022-03-15 21:34:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.5819397993311037) internal successors, (1544), 598 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1544 transitions. [2022-03-15 21:34:08,678 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1544 transitions. Word has length 23 [2022-03-15 21:34:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:08,678 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1544 transitions. [2022-03-15 21:34:08,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1544 transitions. [2022-03-15 21:34:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:08,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:08,678 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:08,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-03-15 21:34:08,879 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 21:34:08,879 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2115325238, now seen corresponding path program 234 times [2022-03-15 21:34:08,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:08,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131180205] [2022-03-15 21:34:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:08,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:08,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:08,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131180205] [2022-03-15 21:34:08,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131180205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:08,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659239627] [2022-03-15 21:34:08,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:34:08,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:08,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:08,977 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 21:34:08,977 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 21:34:09,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:34:09,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:09,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:09,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:09,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:09,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659239627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:09,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:09,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 41 [2022-03-15 21:34:09,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [86937116] [2022-03-15 21:34:09,559 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:09,560 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:09,564 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2022-03-15 21:34:09,564 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:09,630 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [372633#(< i1 N1), 372634#(or (<= N2 i2) (< i1 N1))] [2022-03-15 21:34:09,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:34:09,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:09,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:34:09,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1421, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:34:09,631 INFO L87 Difference]: Start difference. First operand 599 states and 1544 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 21:34:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:09,936 INFO L93 Difference]: Finished difference Result 717 states and 1725 transitions. [2022-03-15 21:34:09,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:34:09,936 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 21:34:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:09,937 INFO L225 Difference]: With dead ends: 717 [2022-03-15 21:34:09,937 INFO L226 Difference]: Without dead ends: 713 [2022-03-15 21:34:09,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1036, Invalid=2996, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:34:09,938 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:09,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-03-15 21:34:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 595. [2022-03-15 21:34:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.585858585858586) internal successors, (1536), 594 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1536 transitions. [2022-03-15 21:34:09,944 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1536 transitions. Word has length 23 [2022-03-15 21:34:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:09,944 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1536 transitions. [2022-03-15 21:34:09,944 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 21:34:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1536 transitions. [2022-03-15 21:34:09,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:09,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:09,945 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:09,960 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 21:34:10,145 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 21:34:10,145 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:10,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash -296582739, now seen corresponding path program 235 times [2022-03-15 21:34:10,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:10,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282830784] [2022-03-15 21:34:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:10,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:10,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282830784] [2022-03-15 21:34:10,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282830784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:10,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611381431] [2022-03-15 21:34:10,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:34:10,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:10,252 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 21:34:10,254 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 21:34:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:10,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:10,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:10,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:10,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611381431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:10,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:10,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 42 [2022-03-15 21:34:10,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1264155447] [2022-03-15 21:34:10,911 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:10,912 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:10,916 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 31 transitions. [2022-03-15 21:34:10,916 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:10,971 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [374758#(or (< i2 N2) (< i1 N1)), 374757#(< i1 N1)] [2022-03-15 21:34:10,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:34:10,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:10,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:34:10,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1556, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:34:10,971 INFO L87 Difference]: Start difference. First operand 595 states and 1536 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 21:34:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:11,102 INFO L93 Difference]: Finished difference Result 883 states and 1995 transitions. [2022-03-15 21:34:11,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:34:11,102 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 21:34:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:11,103 INFO L225 Difference]: With dead ends: 883 [2022-03-15 21:34:11,103 INFO L226 Difference]: Without dead ends: 883 [2022-03-15 21:34:11,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=505, Invalid=1751, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:34:11,104 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:11,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:11,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-03-15 21:34:11,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 599. [2022-03-15 21:34:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.588628762541806) internal successors, (1548), 598 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1548 transitions. [2022-03-15 21:34:11,110 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1548 transitions. Word has length 23 [2022-03-15 21:34:11,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:11,110 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1548 transitions. [2022-03-15 21:34:11,110 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 21:34:11,110 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1548 transitions. [2022-03-15 21:34:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:11,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:11,111 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:11,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-03-15 21:34:11,311 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 21:34:11,311 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash -802141364, now seen corresponding path program 236 times [2022-03-15 21:34:11,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:11,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163159438] [2022-03-15 21:34:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:11,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:11,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:11,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163159438] [2022-03-15 21:34:11,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163159438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:11,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072257606] [2022-03-15 21:34:11,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:34:11,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:11,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:11,414 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 21:34:11,416 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 21:34:11,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:34:11,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:11,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:11,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:12,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072257606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:12,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:12,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 41 [2022-03-15 21:34:12,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1995640445] [2022-03-15 21:34:12,006 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:12,007 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:12,011 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 31 transitions. [2022-03-15 21:34:12,011 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:12,036 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [377020#(< i1 N1)] [2022-03-15 21:34:12,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:34:12,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:12,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:34:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1353, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:34:12,037 INFO L87 Difference]: Start difference. First operand 599 states and 1548 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 21:34:12,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:12,369 INFO L93 Difference]: Finished difference Result 689 states and 1710 transitions. [2022-03-15 21:34:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:34:12,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 21:34:12,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:12,370 INFO L225 Difference]: With dead ends: 689 [2022-03-15 21:34:12,370 INFO L226 Difference]: Without dead ends: 687 [2022-03-15 21:34:12,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:34:12,370 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:12,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-15 21:34:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 612. [2022-03-15 21:34:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.6039279869067102) internal successors, (1591), 611 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1591 transitions. [2022-03-15 21:34:12,377 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1591 transitions. Word has length 23 [2022-03-15 21:34:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:12,377 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1591 transitions. [2022-03-15 21:34:12,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 21:34:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1591 transitions. [2022-03-15 21:34:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:12,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:12,377 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:12,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-03-15 21:34:12,578 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 21:34:12,578 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:12,578 INFO L85 PathProgramCache]: Analyzing trace with hash -741397515, now seen corresponding path program 237 times [2022-03-15 21:34:12,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:12,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416291108] [2022-03-15 21:34:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:12,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:12,684 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 21:34:12,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:12,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416291108] [2022-03-15 21:34:12,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416291108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:12,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569473162] [2022-03-15 21:34:12,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:34:12,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:12,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:12,686 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 21:34:12,686 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 21:34:12,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:34:12,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:12,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:13,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:13,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569473162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:13,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:13,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 42 [2022-03-15 21:34:13,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1833833877] [2022-03-15 21:34:13,360 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:13,362 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:13,366 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:34:13,366 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:13,614 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [379152#(or (< (+ i1 1) N1) (<= N1 i1)), 379154#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 379158#(or (< (+ 7 i1) N1) (<= N1 (+ 6 i1))), 379153#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 379159#(or (<= N1 (+ 7 i1)) (< (+ i1 8) N1)), 379157#(or (<= N1 (+ 5 i1)) (< (+ 6 i1) N1)), 379156#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 379151#(< i1 N1), 379155#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1))] [2022-03-15 21:34:13,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:34:13,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:13,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:34:13,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2194, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:34:13,615 INFO L87 Difference]: Start difference. First operand 612 states and 1591 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:15,355 INFO L93 Difference]: Finished difference Result 1013 states and 2225 transitions. [2022-03-15 21:34:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 21:34:15,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:34:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:15,356 INFO L225 Difference]: With dead ends: 1013 [2022-03-15 21:34:15,357 INFO L226 Difference]: Without dead ends: 1013 [2022-03-15 21:34:15,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2318, Invalid=8812, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 21:34:15,357 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 191 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:15,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 0 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-15 21:34:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 645. [2022-03-15 21:34:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.5745341614906834) internal successors, (1658), 644 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1658 transitions. [2022-03-15 21:34:15,365 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1658 transitions. Word has length 23 [2022-03-15 21:34:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:15,365 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1658 transitions. [2022-03-15 21:34:15,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1658 transitions. [2022-03-15 21:34:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:15,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:15,366 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:15,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-03-15 21:34:15,566 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 21:34:15,566 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash 146106166, now seen corresponding path program 238 times [2022-03-15 21:34:15,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:15,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279222310] [2022-03-15 21:34:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:15,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:15,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:15,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279222310] [2022-03-15 21:34:15,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279222310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:15,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168749985] [2022-03-15 21:34:15,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:34:15,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:15,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:15,675 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 21:34:15,675 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 21:34:15,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:34:15,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:15,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:15,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:15,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:16,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168749985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:16,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:16,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 43 [2022-03-15 21:34:16,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1487304649] [2022-03-15 21:34:16,306 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:16,307 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:16,319 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 29 transitions. [2022-03-15 21:34:16,319 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:16,351 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [381747#(or (< (+ i1 1) N1) (<= N1 i1)), 381680#(< i1 N1)] [2022-03-15 21:34:16,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:34:16,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:34:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1578, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:34:16,352 INFO L87 Difference]: Start difference. First operand 645 states and 1658 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:16,592 INFO L93 Difference]: Finished difference Result 784 states and 1870 transitions. [2022-03-15 21:34:16,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:34:16,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:34:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:16,593 INFO L225 Difference]: With dead ends: 784 [2022-03-15 21:34:16,594 INFO L226 Difference]: Without dead ends: 784 [2022-03-15 21:34:16,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=718, Invalid=2704, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:34:16,594 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:16,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-03-15 21:34:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 645. [2022-03-15 21:34:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.5745341614906834) internal successors, (1658), 644 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1658 transitions. [2022-03-15 21:34:16,601 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1658 transitions. Word has length 23 [2022-03-15 21:34:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:16,601 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1658 transitions. [2022-03-15 21:34:16,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1658 transitions. [2022-03-15 21:34:16,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:16,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:16,602 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:16,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-03-15 21:34:16,802 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 21:34:16,802 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:16,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:16,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1001412820, now seen corresponding path program 239 times [2022-03-15 21:34:16,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:16,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936229185] [2022-03-15 21:34:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:16,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:16,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:16,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936229185] [2022-03-15 21:34:16,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936229185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:16,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202840547] [2022-03-15 21:34:16,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:34:16,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:16,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:16,918 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 21:34:16,918 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 21:34:16,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:34:16,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:16,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:16,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:17,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:17,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202840547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:17,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:17,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 44 [2022-03-15 21:34:17,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [359780572] [2022-03-15 21:34:17,545 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:17,546 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:17,550 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 31 transitions. [2022-03-15 21:34:17,550 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:17,610 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [383960#(< i1 N1), 384027#(or (< (+ i1 1) N1) (<= N1 i1)), 384028#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1))] [2022-03-15 21:34:17,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:34:17,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:17,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:34:17,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:34:17,611 INFO L87 Difference]: Start difference. First operand 645 states and 1658 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:17,934 INFO L93 Difference]: Finished difference Result 802 states and 1898 transitions. [2022-03-15 21:34:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:34:17,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:34:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:17,935 INFO L225 Difference]: With dead ends: 802 [2022-03-15 21:34:17,935 INFO L226 Difference]: Without dead ends: 802 [2022-03-15 21:34:17,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=3340, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:34:17,935 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:17,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:17,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-15 21:34:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 645. [2022-03-15 21:34:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.5745341614906834) internal successors, (1658), 644 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1658 transitions. [2022-03-15 21:34:17,947 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1658 transitions. Word has length 23 [2022-03-15 21:34:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:17,947 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1658 transitions. [2022-03-15 21:34:17,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:17,947 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1658 transitions. [2022-03-15 21:34:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:17,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:17,948 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:17,964 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 21:34:18,148 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 21:34:18,149 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1746115318, now seen corresponding path program 240 times [2022-03-15 21:34:18,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:18,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604287320] [2022-03-15 21:34:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:18,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:18,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:18,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604287320] [2022-03-15 21:34:18,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604287320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:18,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825315627] [2022-03-15 21:34:18,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:34:18,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:18,275 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 21:34:18,276 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 21:34:18,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:34:18,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:18,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:18,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:18,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:18,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825315627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:18,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:18,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 45 [2022-03-15 21:34:18,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [910311431] [2022-03-15 21:34:18,914 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:18,915 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:18,919 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2022-03-15 21:34:18,919 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:19,011 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [386336#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 386335#(or (< (+ i1 1) N1) (<= N1 i1)), 386268#(< i1 N1), 386337#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:34:19,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:34:19,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:34:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:34:19,011 INFO L87 Difference]: Start difference. First operand 645 states and 1658 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 21:34:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:19,389 INFO L93 Difference]: Finished difference Result 808 states and 1902 transitions. [2022-03-15 21:34:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:34:19,390 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 23 [2022-03-15 21:34:19,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:19,391 INFO L225 Difference]: With dead ends: 808 [2022-03-15 21:34:19,391 INFO L226 Difference]: Without dead ends: 808 [2022-03-15 21:34:19,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=3688, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:34:19,391 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:19,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:19,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-03-15 21:34:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 645. [2022-03-15 21:34:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.5745341614906834) internal successors, (1658), 644 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1658 transitions. [2022-03-15 21:34:19,398 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1658 transitions. Word has length 23 [2022-03-15 21:34:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:19,398 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1658 transitions. [2022-03-15 21:34:19,398 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 21:34:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1658 transitions. [2022-03-15 21:34:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:19,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:19,399 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:19,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-03-15 21:34:19,599 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 21:34:19,599 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:19,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:19,600 INFO L85 PathProgramCache]: Analyzing trace with hash -937911020, now seen corresponding path program 241 times [2022-03-15 21:34:19,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:19,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678787545] [2022-03-15 21:34:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:19,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 33 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:19,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:19,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678787545] [2022-03-15 21:34:19,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678787545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:19,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143341313] [2022-03-15 21:34:19,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:34:19,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:19,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:19,753 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 21:34:19,754 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 21:34:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:19,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:19,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:20,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:20,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143341313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:20,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:20,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 46 [2022-03-15 21:34:20,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1613610067] [2022-03-15 21:34:20,388 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:20,389 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:20,393 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2022-03-15 21:34:20,393 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:20,516 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [388653#(or (< (+ i1 1) N1) (<= N1 i1)), 388654#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 388586#(< i1 N1), 388655#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 388656#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1))] [2022-03-15 21:34:20,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:34:20,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:20,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:34:20,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2148, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:34:20,517 INFO L87 Difference]: Start difference. First operand 645 states and 1658 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:20,899 INFO L93 Difference]: Finished difference Result 802 states and 1885 transitions. [2022-03-15 21:34:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:34:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 21:34:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:20,901 INFO L225 Difference]: With dead ends: 802 [2022-03-15 21:34:20,901 INFO L226 Difference]: Without dead ends: 802 [2022-03-15 21:34:20,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=862, Invalid=3830, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:34:20,901 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:20,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-15 21:34:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 645. [2022-03-15 21:34:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.5745341614906834) internal successors, (1658), 644 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1658 transitions. [2022-03-15 21:34:20,908 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1658 transitions. Word has length 23 [2022-03-15 21:34:20,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:20,908 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1658 transitions. [2022-03-15 21:34:20,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:20,908 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1658 transitions. [2022-03-15 21:34:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:20,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:20,909 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:20,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-03-15 21:34:21,109 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 21:34:21,110 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1756618422, now seen corresponding path program 242 times [2022-03-15 21:34:21,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:21,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72465509] [2022-03-15 21:34:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:21,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:21,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:21,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72465509] [2022-03-15 21:34:21,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72465509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:21,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583267837] [2022-03-15 21:34:21,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:34:21,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:21,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:21,252 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 21:34:21,253 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 21:34:21,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:34:21,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:21,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:21,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:21,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583267837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:21,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:21,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 47 [2022-03-15 21:34:21,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [229850411] [2022-03-15 21:34:21,924 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:21,925 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:21,929 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 37 transitions. [2022-03-15 21:34:21,929 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:22,087 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [390968#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 390965#(or (< (+ i1 1) N1) (<= N1 i1)), 390967#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 390898#(< i1 N1), 390966#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 390969#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1))] [2022-03-15 21:34:22,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:34:22,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:34:22,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=2330, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:34:22,088 INFO L87 Difference]: Start difference. First operand 645 states and 1658 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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 21:34:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:22,438 INFO L93 Difference]: Finished difference Result 784 states and 1850 transitions. [2022-03-15 21:34:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:34:22,439 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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 21:34:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:22,439 INFO L225 Difference]: With dead ends: 784 [2022-03-15 21:34:22,440 INFO L226 Difference]: Without dead ends: 784 [2022-03-15 21:34:22,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=3757, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:34:22,440 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:22,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-03-15 21:34:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 645. [2022-03-15 21:34:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.5745341614906834) internal successors, (1658), 644 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1658 transitions. [2022-03-15 21:34:22,447 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1658 transitions. Word has length 23 [2022-03-15 21:34:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:22,447 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1658 transitions. [2022-03-15 21:34:22,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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 21:34:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1658 transitions. [2022-03-15 21:34:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:22,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:22,448 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:22,463 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 21:34:22,648 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 21:34:22,648 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash -612314796, now seen corresponding path program 243 times [2022-03-15 21:34:22,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:22,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939540008] [2022-03-15 21:34:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:22,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:22,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:22,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939540008] [2022-03-15 21:34:22,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939540008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:22,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729291340] [2022-03-15 21:34:22,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:34:22,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:22,803 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 21:34:22,804 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 21:34:22,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:34:22,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:22,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:22,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:23,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:23,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729291340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:23,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:23,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 48 [2022-03-15 21:34:23,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1821929834] [2022-03-15 21:34:23,454 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:23,455 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:23,459 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:34:23,460 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:23,653 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [393256#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 393258#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1)), 393260#(or (<= N1 (+ 5 i1)) (< (+ 6 i1) N1)), 393255#(or (< (+ i1 1) N1) (<= N1 i1)), 393188#(< i1 N1), 393259#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 393257#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1))] [2022-03-15 21:34:23,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:34:23,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:34:23,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=2508, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:34:23,654 INFO L87 Difference]: Start difference. First operand 645 states and 1658 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:23,922 INFO L93 Difference]: Finished difference Result 709 states and 1721 transitions. [2022-03-15 21:34:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:34:23,923 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 21:34:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:23,923 INFO L225 Difference]: With dead ends: 709 [2022-03-15 21:34:23,924 INFO L226 Difference]: Without dead ends: 709 [2022-03-15 21:34:23,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=671, Invalid=3361, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:34:23,924 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:23,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-03-15 21:34:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 610. [2022-03-15 21:34:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 2.6157635467980294) internal successors, (1593), 609 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1593 transitions. [2022-03-15 21:34:23,931 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1593 transitions. Word has length 23 [2022-03-15 21:34:23,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:23,931 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 1593 transitions. [2022-03-15 21:34:23,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1593 transitions. [2022-03-15 21:34:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:23,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:23,932 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:23,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-03-15 21:34:24,132 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 21:34:24,132 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1034800522, now seen corresponding path program 244 times [2022-03-15 21:34:24,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:24,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557566313] [2022-03-15 21:34:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:24,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:24,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:24,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557566313] [2022-03-15 21:34:24,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557566313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:24,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524560027] [2022-03-15 21:34:24,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:34:24,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:24,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:24,303 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 21:34:24,304 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 21:34:24,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:34:24,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:24,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:34:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:24,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:24,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524560027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:24,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:24,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2022-03-15 21:34:24,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2024832070] [2022-03-15 21:34:24,969 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:24,970 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:24,981 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:34:24,981 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:25,215 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [395395#(or (<= N1 (+ 5 i1)) (< (+ 6 i1) N1)), 395323#(< i1 N1), 395394#(or (<= N1 (+ i1 4)) (< (+ 5 i1) N1)), 395396#(or (< (+ 7 i1) N1) (<= N1 (+ 6 i1))), 395391#(or (<= N1 (+ i1 1)) (< (+ 2 i1) N1)), 395392#(or (<= N1 (+ 2 i1)) (< (+ 3 i1) N1)), 395390#(or (< (+ i1 1) N1) (<= N1 i1)), 395393#(or (<= N1 (+ 3 i1)) (< (+ i1 4) N1))] [2022-03-15 21:34:25,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:34:25,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:25,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:34:25,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=2661, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:34:25,216 INFO L87 Difference]: Start difference. First operand 610 states and 1593 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:25,626 INFO L93 Difference]: Finished difference Result 683 states and 1683 transitions. [2022-03-15 21:34:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:34:25,627 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 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 21:34:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:25,628 INFO L225 Difference]: With dead ends: 683 [2022-03-15 21:34:25,628 INFO L226 Difference]: Without dead ends: 683 [2022-03-15 21:34:25,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1018, Invalid=4384, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:34:25,628 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:25,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-15 21:34:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 618. [2022-03-15 21:34:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 2.620745542949757) internal successors, (1617), 617 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1617 transitions. [2022-03-15 21:34:25,635 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1617 transitions. Word has length 23 [2022-03-15 21:34:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:25,635 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 1617 transitions. [2022-03-15 21:34:25,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1617 transitions. [2022-03-15 21:34:25,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:34:25,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:25,635 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:25,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-03-15 21:34:25,836 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 21:34:25,836 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1209204450, now seen corresponding path program 245 times [2022-03-15 21:34:25,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:25,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29979339] [2022-03-15 21:34:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:25,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:25,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:25,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29979339] [2022-03-15 21:34:25,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29979339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:25,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949483695] [2022-03-15 21:34:25,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:34:25,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:25,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:25,904 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 21:34:25,904 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 21:34:25,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:34:25,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:25,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 21:34:25,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:26,431 INFO L353 Elim1Store]: treesize reduction 160, result has 44.6 percent of original size [2022-03-15 21:34:26,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 247 treesize of output 221 Received shutdown request... [2022-03-15 21:38:43,599 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 21:38:43,601 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 21:38:43,612 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 21:38:43,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-03-15 21:38:43,642 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 21:38:43,802 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 21:38:43,802 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. [2022-03-15 21:38:43,803 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 21:38:43,803 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 21:38:43,805 INFO L732 BasicCegarLoop]: Path program histogram: [245, 2, 1, 1] [2022-03-15 21:38:43,806 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 21:38:43,806 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 21:38:43,807 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 09:38:43 BasicIcfg [2022-03-15 21:38:43,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 21:38:43,807 INFO L158 Benchmark]: Toolchain (without parser) took 708372.14ms. Allocated memory was 176.2MB in the beginning and 289.4MB in the end (delta: 113.2MB). Free memory was 141.2MB in the beginning and 150.7MB in the end (delta: -9.5MB). Peak memory consumption was 179.5MB. Max. memory is 8.0GB. [2022-03-15 21:38:43,807 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 176.2MB. Free memory is still 142.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:38:43,807 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.62ms. Allocated memory is still 176.2MB. Free memory was 141.1MB in the beginning and 139.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:38:43,808 INFO L158 Benchmark]: Boogie Preprocessor took 14.31ms. Allocated memory is still 176.2MB. Free memory was 139.6MB in the beginning and 138.7MB in the end (delta: 957.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:38:43,808 INFO L158 Benchmark]: RCFGBuilder took 203.33ms. Allocated memory is still 176.2MB. Free memory was 138.6MB in the beginning and 129.0MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 21:38:43,808 INFO L158 Benchmark]: TraceAbstraction took 708124.85ms. Allocated memory was 176.2MB in the beginning and 289.4MB in the end (delta: 113.2MB). Free memory was 128.5MB in the beginning and 150.7MB in the end (delta: -22.3MB). Peak memory consumption was 165.9MB. Max. memory is 8.0GB. [2022-03-15 21:38:43,808 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 0.12ms. Allocated memory is still 176.2MB. Free memory is still 142.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.62ms. Allocated memory is still 176.2MB. Free memory was 141.1MB in the beginning and 139.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.31ms. Allocated memory is still 176.2MB. Free memory was 139.6MB in the beginning and 138.7MB in the end (delta: 957.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 203.33ms. Allocated memory is still 176.2MB. Free memory was 138.6MB in the beginning and 129.0MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 708124.85ms. Allocated memory was 176.2MB in the beginning and 289.4MB in the end (delta: 113.2MB). Free memory was 128.5MB in the beginning and 150.7MB in the end (delta: -22.3MB). Peak memory consumption was 165.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.3s, 27 PlacesBefore, 18 PlacesAfterwards, 22 TransitionsBefore, 13 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 3 FixpointIterations, 6 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 48 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 48, positive: 48, positive conditional: 0, positive unconditional: 48, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 22, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 48, positive: 26, positive conditional: 0, positive unconditional: 26, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 22, unknown conditional: 0, unknown unconditional: 22] , 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: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 708.0s, OverallIterations: 249, TraceHistogramMax: 8, PathProgramHistogramMax: 245, EmptinessCheckTime: 0.2s, AutomataDifference: 67.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15953 SdHoareTripleChecker+Valid, 24.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15953 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 20.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19956 mSDsCounter, 5648 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 55603 IncrementalHoareTripleChecker+Invalid, 61251 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5648 mSolverCounterUnsat, 0 mSDtfsCounter, 55603 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16729 GetRequests, 5356 SyntacticMatches, 378 SemanticMatches, 10995 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171194 ImplicationChecksByTransitivity, 133.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=898occurred in iteration=216, InterpolantAutomatonStates: 4463, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 248 MinimizatonAttempts, 31902 StatesRemovedByMinimization, 247 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 293.6s InterpolantComputationTime, 9335 NumberOfCodeBlocks, 9335 NumberOfCodeBlocksAsserted, 1058 NumberOfCheckSat, 13251 ConstructedInterpolants, 56 QuantifiedInterpolants, 148662 SizeOfPredicates, 702 NumberOfNonLiveVariables, 24983 ConjunctsInSsa, 4366 ConjunctsInUnsatCore, 738 InterpolantComputations, 4 PerfectInterpolantSequences, 12463/28726 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