/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-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 22:13:27,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 22:13:27,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 22:13:27,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 22:13:27,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 22:13:27,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 22:13:27,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 22:13:27,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 22:13:27,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 22:13:27,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 22:13:27,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 22:13:27,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-15 22:13:27,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 22:13:27,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 22:13:27,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 22:13:27,815 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 22:13:27,833 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 22:13:27,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 22:13:27,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 22:13:27,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 22:13:27,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 22:13:27,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 22:13:27,835 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 22:13:27,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 22:13:27,835 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 22:13:27,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 22:13:27,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 22:13:27,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 22:13:27,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 22:13:27,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 22:13:27,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 22:13:27,839 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 22:13:27,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 22:13:27,839 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 22:13:27,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 22:13:27,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 22:13:27,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 22:13:27,840 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 22:13:27,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 22:13:27,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 22:13:27,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 22:13:27,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 22:13:27,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 22:13:27,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 22:13:27,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 22:13:27,841 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 22:13:27,841 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 22:13:27,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 22:13:27,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 22:13:28,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 22:13:28,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 22:13:28,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 22:13:28,057 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 22:13:28,058 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 22:13:28,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2022-03-15 22:13:28,059 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2022-03-15 22:13:28,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 22:13:28,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 22:13:28,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 22:13:28,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 22:13:28,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 22:13:28,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/1) ... [2022-03-15 22:13:28,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/1) ... [2022-03-15 22:13:28,107 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 22:13:28,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 22:13:28,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 22:13:28,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 22:13:28,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 22:13:28,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/1) ... [2022-03-15 22:13:28,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/1) ... [2022-03-15 22:13:28,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/1) ... [2022-03-15 22:13:28,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/1) ... [2022-03-15 22:13:28,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/1) ... [2022-03-15 22:13:28,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/1) ... [2022-03-15 22:13:28,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/1) ... [2022-03-15 22:13:28,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 22:13:28,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 22:13:28,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 22:13:28,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 22:13:28,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/1) ... [2022-03-15 22:13:28,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 22:13:28,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:28,139 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 22:13:28,171 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 22:13:28,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 22:13:28,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 22:13:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 22:13:28,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 22:13:28,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 22:13:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 22:13:28,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 22:13:28,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 22:13:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 22:13:28,197 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 22:13:28,230 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 22:13:28,231 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 22:13:28,297 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 22:13:28,307 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 22:13:28,307 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 22:13:28,308 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 10:13:28 BoogieIcfgContainer [2022-03-15 22:13:28,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 22:13:28,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 22:13:28,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 22:13:28,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 22:13:28,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:13:28" (1/2) ... [2022-03-15 22:13:28,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bedfdb and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 10:13:28, skipping insertion in model container [2022-03-15 22:13:28,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 10:13:28" (2/2) ... [2022-03-15 22:13:28,316 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2022-03-15 22:13:28,319 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 22:13:28,320 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 22:13:28,320 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 22:13:28,320 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 22:13:28,338 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 22:13:28,393 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 22:13:28,401 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 22:13:28,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 22:13:28,410 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 22:13:28,421 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 23 transitions, 62 flow [2022-03-15 22:13:28,424 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 23 transitions, 62 flow [2022-03-15 22:13:28,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 62 flow [2022-03-15 22:13:28,452 INFO L129 PetriNetUnfolder]: 2/21 cut-off events. [2022-03-15 22:13:28,453 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 22:13:28,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 15 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2022-03-15 22:13:28,457 INFO L116 LiptonReduction]: Number of co-enabled transitions 48 [2022-03-15 22:13:28,641 INFO L131 LiptonReduction]: Checked pairs total: 48 [2022-03-15 22:13:28,642 INFO L133 LiptonReduction]: Total number of compositions: 11 [2022-03-15 22:13:28,647 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 13 transitions, 42 flow [2022-03-15 22:13:28,654 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 22:13:28,655 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 22:13:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 22:13:28,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:28,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:28,659 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2135829109, now seen corresponding path program 1 times [2022-03-15 22:13:28,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:28,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169195045] [2022-03-15 22:13:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:28,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:28,774 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 22:13:28,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:28,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169195045] [2022-03-15 22:13:28,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169195045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:13:28,775 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:13:28,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 22:13:28,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1390366155] [2022-03-15 22:13:28,777 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:28,778 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:28,789 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 22:13:28,790 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:28,875 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:13:28,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 22:13:28,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 22:13:28,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 22:13:28,894 INFO L87 Difference]: Start difference. First operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:28,913 INFO L93 Difference]: Finished difference Result 15 states and 26 transitions. [2022-03-15 22:13:28,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 22:13:28,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-03-15 22:13:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:28,920 INFO L225 Difference]: With dead ends: 15 [2022-03-15 22:13:28,920 INFO L226 Difference]: Without dead ends: 15 [2022-03-15 22:13:28,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 22:13:28,923 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:28,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:13:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-15 22:13:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-15 22:13:28,942 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 22:13:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 26 transitions. [2022-03-15 22:13:28,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 26 transitions. Word has length 8 [2022-03-15 22:13:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:28,943 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 26 transitions. [2022-03-15 22:13:28,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:28,944 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 26 transitions. [2022-03-15 22:13:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 22:13:28,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:28,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:28,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 22:13:28,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:28,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1786314901, now seen corresponding path program 1 times [2022-03-15 22:13:28,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:28,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868586747] [2022-03-15 22:13:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:28,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:13:28,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:28,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868586747] [2022-03-15 22:13:28,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868586747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:13:28,985 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:13:28,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 22:13:28,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [442103009] [2022-03-15 22:13:28,986 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:28,986 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:28,988 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2022-03-15 22:13:28,988 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:29,043 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [106#(< j1 M1)] [2022-03-15 22:13:29,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 22:13:29,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:29,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 22:13:29,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 22:13:29,045 INFO L87 Difference]: Start difference. First operand 15 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:29,063 INFO L93 Difference]: Finished difference Result 19 states and 34 transitions. [2022-03-15 22:13:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 22:13:29,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-03-15 22:13:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:29,067 INFO L225 Difference]: With dead ends: 19 [2022-03-15 22:13:29,067 INFO L226 Difference]: Without dead ends: 19 [2022-03-15 22:13:29,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 22:13:29,070 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:29,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:13:29,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-15 22:13:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-15 22:13:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 34 transitions. [2022-03-15 22:13:29,074 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 34 transitions. Word has length 9 [2022-03-15 22:13:29,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:29,074 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 34 transitions. [2022-03-15 22:13:29,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 34 transitions. [2022-03-15 22:13:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 22:13:29,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:29,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:29,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 22:13:29,075 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash -274000110, now seen corresponding path program 1 times [2022-03-15 22:13:29,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:29,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707243587] [2022-03-15 22:13:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:29,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:29,189 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 22:13:29,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:29,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707243587] [2022-03-15 22:13:29,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707243587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:29,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299745620] [2022-03-15 22:13:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:29,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:29,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:29,204 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 22:13:29,205 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 22:13:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:29,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:13:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:29,472 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 22:13:29,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:29,699 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 22:13:29,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299745620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:29,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:29,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-03-15 22:13:29,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [113354250] [2022-03-15 22:13:29,700 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:29,700 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:29,706 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 22 transitions. [2022-03-15 22:13:29,707 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:29,814 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:13:29,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:13:29,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:29,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:13:29,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-15 22:13:29,815 INFO L87 Difference]: Start difference. First operand 19 states and 34 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 22:13:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:29,854 INFO L93 Difference]: Finished difference Result 38 states and 71 transitions. [2022-03-15 22:13:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 22:13:29,855 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 10 [2022-03-15 22:13:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:29,855 INFO L225 Difference]: With dead ends: 38 [2022-03-15 22:13:29,855 INFO L226 Difference]: Without dead ends: 35 [2022-03-15 22:13:29,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-15 22:13:29,856 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:29,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:13:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-15 22:13:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2022-03-15 22:13:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 50 transitions. [2022-03-15 22:13:29,860 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 50 transitions. Word has length 10 [2022-03-15 22:13:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:29,860 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 50 transitions. [2022-03-15 22:13:29,860 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 22:13:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 50 transitions. [2022-03-15 22:13:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 22:13:29,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:29,861 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:29,880 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 22:13:30,061 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 22:13:30,062 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:30,062 INFO L85 PathProgramCache]: Analyzing trace with hash 96053144, now seen corresponding path program 2 times [2022-03-15 22:13:30,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:30,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725080904] [2022-03-15 22:13:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:30,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:30,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:30,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725080904] [2022-03-15 22:13:30,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725080904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:30,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945478349] [2022-03-15 22:13:30,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:13:30,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:30,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:30,144 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 22:13:30,145 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 22:13:30,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:13:30,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:30,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 22:13:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:30,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:30,304 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 22:13:30,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945478349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:30,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:30,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-03-15 22:13:30,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [498134265] [2022-03-15 22:13:30,306 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:30,307 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:30,308 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2022-03-15 22:13:30,308 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:30,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [390#(or (< j1 M1) (<= (+ j2 1) M2)), 391#(or (<= M2 j2) (<= counter 0) (< j1 M1)), 389#(< j1 M1), 392#(or (< j1 M1) (<= M2 (+ j2 1))), 393#(or (<= M2 (+ j2 1)) (< (+ j1 1) M1) (<= M1 j1))] [2022-03-15 22:13:30,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:13:30,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:30,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:13:30,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-15 22:13:30,484 INFO L87 Difference]: Start difference. First operand 26 states and 50 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 22:13:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:30,739 INFO L93 Difference]: Finished difference Result 46 states and 80 transitions. [2022-03-15 22:13:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:13:30,739 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 11 [2022-03-15 22:13:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:30,740 INFO L225 Difference]: With dead ends: 46 [2022-03-15 22:13:30,740 INFO L226 Difference]: Without dead ends: 39 [2022-03-15 22:13:30,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:13:30,741 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:30,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:30,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-15 22:13:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 21. [2022-03-15 22:13:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 38 transitions. [2022-03-15 22:13:30,744 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 38 transitions. Word has length 11 [2022-03-15 22:13:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:30,744 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 38 transitions. [2022-03-15 22:13:30,744 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 22:13:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 38 transitions. [2022-03-15 22:13:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 22:13:30,745 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:30,745 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:30,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 22:13:30,961 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 22:13:30,961 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:30,962 INFO L85 PathProgramCache]: Analyzing trace with hash 280743989, now seen corresponding path program 3 times [2022-03-15 22:13:30,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:30,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918745797] [2022-03-15 22:13:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:31,031 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 22:13:31,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:31,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918745797] [2022-03-15 22:13:31,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918745797] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:31,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244272273] [2022-03-15 22:13:31,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:13:31,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:31,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:31,045 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 22:13:31,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 22:13:31,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 22:13:31,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:31,082 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 22:13:31,152 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 22:13:31,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:31,209 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 22:13:31,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244272273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:31,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:31,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-15 22:13:31,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [484371211] [2022-03-15 22:13:31,217 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:31,217 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:31,218 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 25 transitions. [2022-03-15 22:13:31,218 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:31,345 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [579#(or (< j1 M1) (<= (+ 2 j2) M2)), 577#(< j1 M1), 581#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ 2 j2) M2)), 578#(or (< j1 M1) (<= (+ j2 1) M2)), 580#(or (<= (+ 2 j2) M2) (< (+ j1 1) M1) (<= M1 j1))] [2022-03-15 22:13:31,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:13:31,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:31,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:13:31,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-03-15 22:13:31,346 INFO L87 Difference]: Start difference. First operand 21 states and 38 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 22:13:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:31,484 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2022-03-15 22:13:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 22:13:31,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-15 22:13:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:31,485 INFO L225 Difference]: With dead ends: 58 [2022-03-15 22:13:31,486 INFO L226 Difference]: Without dead ends: 58 [2022-03-15 22:13:31,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-03-15 22:13:31,486 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:31,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-15 22:13:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2022-03-15 22:13:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 61 transitions. [2022-03-15 22:13:31,490 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 61 transitions. Word has length 11 [2022-03-15 22:13:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:31,490 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 61 transitions. [2022-03-15 22:13:31,490 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 22:13:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 61 transitions. [2022-03-15 22:13:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 22:13:31,490 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:31,490 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:31,528 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 22:13:31,703 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 22:13:31,703 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2035191425, now seen corresponding path program 4 times [2022-03-15 22:13:31,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:31,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432255915] [2022-03-15 22:13:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:31,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:31,746 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 22:13:31,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:31,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432255915] [2022-03-15 22:13:31,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432255915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:31,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016729160] [2022-03-15 22:13:31,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:13:31,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:31,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:31,751 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 22:13:31,752 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 22:13:31,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:13:31,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:31,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 22:13:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:31,851 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 22:13:31,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:31,921 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 22:13:31,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016729160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:31,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:31,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-03-15 22:13:31,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1044929651] [2022-03-15 22:13:31,921 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:31,922 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:31,923 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2022-03-15 22:13:31,923 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:31,966 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [784#(< j2 M2), 785#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= j2 j1) (<= M1 j1)))] [2022-03-15 22:13:31,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 22:13:31,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 22:13:31,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-15 22:13:31,967 INFO L87 Difference]: Start difference. First operand 30 states and 61 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 22:13:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:32,040 INFO L93 Difference]: Finished difference Result 42 states and 76 transitions. [2022-03-15 22:13:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 22:13:32,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-15 22:13:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:32,041 INFO L225 Difference]: With dead ends: 42 [2022-03-15 22:13:32,041 INFO L226 Difference]: Without dead ends: 41 [2022-03-15 22:13:32,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-03-15 22:13:32,042 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:32,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:13:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-15 22:13:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2022-03-15 22:13:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 61 transitions. [2022-03-15 22:13:32,045 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 61 transitions. Word has length 11 [2022-03-15 22:13:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:32,045 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 61 transitions. [2022-03-15 22:13:32,045 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 22:13:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 61 transitions. [2022-03-15 22:13:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 22:13:32,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:32,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:32,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 22:13:32,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:32,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:32,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:32,256 INFO L85 PathProgramCache]: Analyzing trace with hash 113251029, now seen corresponding path program 5 times [2022-03-15 22:13:32,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:32,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056198151] [2022-03-15 22:13:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:32,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:32,375 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 22:13:32,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:32,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056198151] [2022-03-15 22:13:32,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056198151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:32,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545211256] [2022-03-15 22:13:32,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:13:32,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:32,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:32,377 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 22:13:32,378 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 22:13:32,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:13:32,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:13:32,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:32,648 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 22:13:32,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:32,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545211256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:32,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:32,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2022-03-15 22:13:32,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1409898820] [2022-03-15 22:13:32,770 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:32,771 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:32,772 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2022-03-15 22:13:32,772 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:33,107 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [980#(or (< j1 M1) (= counter 0)), 984#(and (or (not (< j1 M1)) (<= C counter) (< (+ j1 1) M1)) (or (not (< j1 M1)) (<= counter C) (< (+ j1 1) M1)) (or (not (< j1 M1)) (<= (+ 2 j2) M2) (< (+ j1 1) M1))), 983#(and (or (< j1 M1) (<= (+ 2 j2) M2)) (or (<= counter (* 2 C)) (< j1 M1)) (or (< j1 M1) (<= (* 2 C) counter))), 985#(and (or (< (+ 2 j1) M1) (<= 0 counter) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= counter 0) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= (+ 2 j2) M2) (not (< (+ j1 1) M1)))), 982#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 981#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:13:33,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:13:33,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:33,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:13:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-15 22:13:33,109 INFO L87 Difference]: Start difference. First operand 31 states and 61 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:33,561 INFO L93 Difference]: Finished difference Result 85 states and 162 transitions. [2022-03-15 22:13:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:13:33,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 22:13:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:33,562 INFO L225 Difference]: With dead ends: 85 [2022-03-15 22:13:33,562 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 22:13:33,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:13:33,563 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:33,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:33,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 22:13:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 41. [2022-03-15 22:13:33,566 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 22:13:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 87 transitions. [2022-03-15 22:13:33,566 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 87 transitions. Word has length 12 [2022-03-15 22:13:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:33,566 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 87 transitions. [2022-03-15 22:13:33,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 87 transitions. [2022-03-15 22:13:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 22:13:33,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:33,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:33,583 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 22:13:33,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:33,768 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:33,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:33,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1267300997, now seen corresponding path program 6 times [2022-03-15 22:13:33,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:33,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052188812] [2022-03-15 22:13:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:33,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:33,871 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 22:13:33,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:33,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052188812] [2022-03-15 22:13:33,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052188812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:33,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261314964] [2022-03-15 22:13:33,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:13:33,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:33,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:33,884 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 22:13:33,904 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 22:13:33,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 22:13:33,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:33,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:13:33,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:34,128 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 22:13:34,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:34,259 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 22:13:34,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261314964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:34,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:34,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2022-03-15 22:13:34,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [65089789] [2022-03-15 22:13:34,259 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:34,260 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:34,261 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2022-03-15 22:13:34,261 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:34,351 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1257#(or (< j2 M2) (< j1 M1) (= counter 0)), 1255#(or (< j1 M1) (= counter 0)), 1256#(and (or (not (< j1 M1)) (= counter 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:13:34,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:13:34,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:34,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:13:34,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-15 22:13:34,352 INFO L87 Difference]: Start difference. First operand 41 states and 87 transitions. Second 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 22:13:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:34,724 INFO L93 Difference]: Finished difference Result 81 states and 166 transitions. [2022-03-15 22:13:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:13:34,724 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 12 [2022-03-15 22:13:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:34,725 INFO L225 Difference]: With dead ends: 81 [2022-03-15 22:13:34,725 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 22:13:34,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:13:34,726 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:34,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 22:13:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2022-03-15 22:13:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 99 transitions. [2022-03-15 22:13:34,729 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 99 transitions. Word has length 12 [2022-03-15 22:13:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:34,729 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 99 transitions. [2022-03-15 22:13:34,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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 22:13:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 99 transitions. [2022-03-15 22:13:34,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 22:13:34,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:34,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:34,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 22:13:34,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:34,939 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:34,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:34,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2132546957, now seen corresponding path program 7 times [2022-03-15 22:13:34,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:34,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244226663] [2022-03-15 22:13:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:34,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:35,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:35,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244226663] [2022-03-15 22:13:35,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244226663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:35,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783133616] [2022-03-15 22:13:35,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:13:35,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:35,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:35,009 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 22:13:35,015 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 22:13:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:35,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 22:13:35,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:13:35,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:13:35,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783133616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:35,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:35,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-03-15 22:13:35,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1449961360] [2022-03-15 22:13:35,133 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:35,134 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:35,138 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2022-03-15 22:13:35,138 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:35,186 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1478#(< j2 M2), 1528#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:13:35,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:13:35,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:35,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:13:35,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-15 22:13:35,186 INFO L87 Difference]: Start difference. First operand 45 states and 99 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 22:13:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:35,378 INFO L93 Difference]: Finished difference Result 92 states and 182 transitions. [2022-03-15 22:13:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:13:35,379 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 12 [2022-03-15 22:13:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:35,379 INFO L225 Difference]: With dead ends: 92 [2022-03-15 22:13:35,379 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 22:13:35,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-03-15 22:13:35,381 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 26 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, 26 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:35,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 22:13:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2022-03-15 22:13:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.240740740740741) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 121 transitions. [2022-03-15 22:13:35,396 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 121 transitions. Word has length 12 [2022-03-15 22:13:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:35,397 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 121 transitions. [2022-03-15 22:13:35,397 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 22:13:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 121 transitions. [2022-03-15 22:13:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 22:13:35,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:35,397 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:35,429 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 22:13:35,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:35,614 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash -784063435, now seen corresponding path program 8 times [2022-03-15 22:13:35,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:35,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543750407] [2022-03-15 22:13:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:35,726 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 22:13:35,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:35,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543750407] [2022-03-15 22:13:35,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543750407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:35,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816892965] [2022-03-15 22:13:35,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:13:35,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:35,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:35,727 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 22:13:35,728 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 22:13:35,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:13:35,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 22:13:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:35,850 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 22:13:35,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:35,954 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 22:13:35,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816892965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:35,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:35,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-03-15 22:13:35,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [863984625] [2022-03-15 22:13:35,955 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:35,956 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:35,957 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2022-03-15 22:13:35,957 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:36,242 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1836#(or (< j1 M1) (<= (+ j2 1) M2)), 1839#(and (or (< j1 M1) (<= (* 2 C) counter)) (or (< j1 M1) (<= M2 (+ 2 j2)))), 1835#(< j1 M1), 1838#(or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))), 1837#(or (<= M2 j2) (<= counter 0) (< j1 M1)), 1840#(and (or (not (< j1 M1)) (<= M2 (+ 2 j2)) (< (+ j1 1) M1)) (or (not (< j1 M1)) (<= C counter) (< (+ j1 1) M1))), 1841#(and (or (< (+ 2 j1) M1) (<= 0 counter) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= M2 (+ 2 j2)) (not (< (+ j1 1) M1))))] [2022-03-15 22:13:36,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:13:36,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:13:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-15 22:13:36,243 INFO L87 Difference]: Start difference. First operand 55 states and 121 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 22:13:36,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:36,607 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2022-03-15 22:13:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:13:36,608 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 13 [2022-03-15 22:13:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:36,608 INFO L225 Difference]: With dead ends: 89 [2022-03-15 22:13:36,608 INFO L226 Difference]: Without dead ends: 76 [2022-03-15 22:13:36,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:13:36,610 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:36,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-15 22:13:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2022-03-15 22:13:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 111 transitions. [2022-03-15 22:13:36,618 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 111 transitions. Word has length 13 [2022-03-15 22:13:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:36,618 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 111 transitions. [2022-03-15 22:13:36,618 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 22:13:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 111 transitions. [2022-03-15 22:13:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 22:13:36,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:36,619 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:36,637 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 22:13:36,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 22:13:36,831 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:36,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:36,831 INFO L85 PathProgramCache]: Analyzing trace with hash 646385464, now seen corresponding path program 9 times [2022-03-15 22:13:36,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:36,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804653274] [2022-03-15 22:13:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:36,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:36,882 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 22:13:36,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:36,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804653274] [2022-03-15 22:13:36,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804653274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:36,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861329478] [2022-03-15 22:13:36,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:13:36,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:36,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:36,884 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 22:13:36,885 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 22:13:36,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 22:13:36,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:36,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:13:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:37,036 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 22:13:37,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:37,141 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 22:13:37,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861329478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:37,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:37,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-03-15 22:13:37,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1602353366] [2022-03-15 22:13:37,141 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:37,142 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:37,144 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2022-03-15 22:13:37,144 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:37,330 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [2150#(< j1 M1), 2155#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ 3 j2) M2)), 2154#(or (<= (+ 3 j2) M2) (< (+ j1 1) M1) (<= M1 j1)), 2152#(or (< j1 M1) (<= (+ 2 j2) M2)), 2156#(or (<= M1 (+ 2 j1)) (< (+ 3 j1) M1) (<= (+ 3 j2) M2)), 2151#(or (< j1 M1) (<= (+ j2 1) M2)), 2153#(or (< j1 M1) (<= (+ 3 j2) M2))] [2022-03-15 22:13:37,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:13:37,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:37,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:13:37,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:13:37,331 INFO L87 Difference]: Start difference. First operand 52 states and 111 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 22:13:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:37,549 INFO L93 Difference]: Finished difference Result 118 states and 221 transitions. [2022-03-15 22:13:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:13:37,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 22:13:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:37,550 INFO L225 Difference]: With dead ends: 118 [2022-03-15 22:13:37,550 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 22:13:37,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:13:37,551 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:37,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:37,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 22:13:37,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 57. [2022-03-15 22:13:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 123 transitions. [2022-03-15 22:13:37,553 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 123 transitions. Word has length 13 [2022-03-15 22:13:37,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:37,553 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 123 transitions. [2022-03-15 22:13:37,553 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 22:13:37,554 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 123 transitions. [2022-03-15 22:13:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 22:13:37,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:37,554 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:37,570 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 22:13:37,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:37,759 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:37,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1629285904, now seen corresponding path program 10 times [2022-03-15 22:13:37,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:37,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360683240] [2022-03-15 22:13:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:37,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:37,825 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 22:13:37,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:37,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360683240] [2022-03-15 22:13:37,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360683240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:37,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007660185] [2022-03-15 22:13:37,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:13:37,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:37,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:37,827 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 22:13:37,828 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 22:13:37,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:13:37,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:13:37,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:37,990 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 22:13:37,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:38,101 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 22:13:38,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007660185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:38,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:38,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-03-15 22:13:38,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1825670128] [2022-03-15 22:13:38,101 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:38,102 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:38,103 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 22:13:38,103 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:38,183 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2498#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= M1 j1) (<= (+ j2 1) j1))), 2500#(< j2 M2), 2499#(and (or (<= j2 j1) (<= M1 (+ j1 1))) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 22:13:38,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:13:38,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:13:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-03-15 22:13:38,183 INFO L87 Difference]: Start difference. First operand 57 states and 123 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 22:13:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:38,289 INFO L93 Difference]: Finished difference Result 81 states and 157 transitions. [2022-03-15 22:13:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 22:13:38,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 22:13:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:38,289 INFO L225 Difference]: With dead ends: 81 [2022-03-15 22:13:38,290 INFO L226 Difference]: Without dead ends: 80 [2022-03-15 22:13:38,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:13:38,290 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:38,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:13:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-15 22:13:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2022-03-15 22:13:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 122 transitions. [2022-03-15 22:13:38,292 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 122 transitions. Word has length 13 [2022-03-15 22:13:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:38,293 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 122 transitions. [2022-03-15 22:13:38,293 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 22:13:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 122 transitions. [2022-03-15 22:13:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 22:13:38,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:38,293 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:38,310 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 22:13:38,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-15 22:13:38,503 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash -9644807, now seen corresponding path program 11 times [2022-03-15 22:13:38,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:38,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632192458] [2022-03-15 22:13:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:38,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:38,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:38,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632192458] [2022-03-15 22:13:38,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632192458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:38,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607900061] [2022-03-15 22:13:38,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:13:38,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:38,659 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 22:13:38,661 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 22:13:38,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 22:13:38,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:38,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:13:38,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:38,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:39,094 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 22:13:39,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607900061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:39,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:39,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 16 [2022-03-15 22:13:39,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [758968217] [2022-03-15 22:13:39,095 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:39,095 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:39,097 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 22:13:39,097 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:39,198 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2802#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1)))), 2801#(or (< j2 M2) (< j1 M1) (= counter 0)), 2800#(or (< j1 M1) (= counter 0))] [2022-03-15 22:13:39,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:13:39,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:13:39,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-15 22:13:39,199 INFO L87 Difference]: Start difference. First operand 57 states and 122 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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 22:13:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:39,382 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2022-03-15 22:13:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:13:39,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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 22:13:39,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:39,382 INFO L225 Difference]: With dead ends: 98 [2022-03-15 22:13:39,382 INFO L226 Difference]: Without dead ends: 85 [2022-03-15 22:13:39,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:13:39,383 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:39,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-15 22:13:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 57. [2022-03-15 22:13:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 122 transitions. [2022-03-15 22:13:39,385 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 122 transitions. Word has length 13 [2022-03-15 22:13:39,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:39,385 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 122 transitions. [2022-03-15 22:13:39,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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 22:13:39,385 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 122 transitions. [2022-03-15 22:13:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 22:13:39,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:39,386 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:39,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 22:13:39,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 22:13:39,595 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1436765134, now seen corresponding path program 12 times [2022-03-15 22:13:39,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:39,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456280904] [2022-03-15 22:13:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:39,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:39,740 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 22:13:39,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:39,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456280904] [2022-03-15 22:13:39,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456280904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:39,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141956640] [2022-03-15 22:13:39,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:13:39,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:39,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:39,742 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 22:13:39,743 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 22:13:39,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:13:39,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:39,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:13:39,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:40,007 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 22:13:40,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:40,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141956640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:40,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:40,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2022-03-15 22:13:40,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [437578345] [2022-03-15 22:13:40,167 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:40,168 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:40,169 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2022-03-15 22:13:40,169 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:40,718 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [3131#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 3135#(and (or (< (+ 2 j1) M1) (<= (+ 3 j2) M2) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= C counter) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= counter C))), 3129#(or (< j1 M1) (= counter 0)), 3133#(and (or (< j1 M1) (<= counter (* 3 C))) (or (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (* 3 C) counter))), 3132#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 3134#(and (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< j1 M1)) (< (+ j1 1) M1)) (or (not (< j1 M1)) (<= (+ 3 j2) M2) (< (+ j1 1) M1))), 3130#(or (< j2 M2) (< j1 M1) (= counter 0)), 3136#(and (or (<= counter 0) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (<= (+ 3 j2) M2) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))))] [2022-03-15 22:13:40,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:13:40,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:40,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:13:40,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:13:40,719 INFO L87 Difference]: Start difference. First operand 57 states and 122 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:41,527 INFO L93 Difference]: Finished difference Result 150 states and 303 transitions. [2022-03-15 22:13:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:13:41,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 22:13:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:41,529 INFO L225 Difference]: With dead ends: 150 [2022-03-15 22:13:41,529 INFO L226 Difference]: Without dead ends: 143 [2022-03-15 22:13:41,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:13:41,529 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:41,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-15 22:13:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 71. [2022-03-15 22:13:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.2857142857142856) internal successors, (160), 70 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 160 transitions. [2022-03-15 22:13:41,532 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 160 transitions. Word has length 14 [2022-03-15 22:13:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:41,532 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 160 transitions. [2022-03-15 22:13:41,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 160 transitions. [2022-03-15 22:13:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 22:13:41,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:41,533 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:41,557 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 22:13:41,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 22:13:41,733 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash -20954494, now seen corresponding path program 13 times [2022-03-15 22:13:41,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:41,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296210404] [2022-03-15 22:13:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:41,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:41,902 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 22:13:41,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:41,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296210404] [2022-03-15 22:13:41,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296210404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:41,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462482808] [2022-03-15 22:13:41,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:13:41,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:41,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:41,903 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 22:13:41,905 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 22:13:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:41,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:13:41,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:42,187 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 22:13:42,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:13:42,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462482808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:42,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:42,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 18 [2022-03-15 22:13:42,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [288006152] [2022-03-15 22:13:42,332 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:42,333 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:42,334 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2022-03-15 22:13:42,334 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:42,593 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [3557#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 3558#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 3556#(or (< j2 M2) (< j1 M1) (= counter 0)), 3555#(or (< j1 M1) (= counter 0)), 3559#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:13:42,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:13:42,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:42,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:13:42,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-15 22:13:42,594 INFO L87 Difference]: Start difference. First operand 71 states and 160 transitions. Second operand has 16 states, 15 states have (on average 1.8) 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 22:13:43,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:43,708 INFO L93 Difference]: Finished difference Result 163 states and 329 transitions. [2022-03-15 22:13:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 22:13:43,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) 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 14 [2022-03-15 22:13:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:43,709 INFO L225 Difference]: With dead ends: 163 [2022-03-15 22:13:43,710 INFO L226 Difference]: Without dead ends: 156 [2022-03-15 22:13:43,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=343, Invalid=1913, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:13:43,710 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:43,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:13:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-15 22:13:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 77. [2022-03-15 22:13:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.3026315789473686) internal successors, (175), 76 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 175 transitions. [2022-03-15 22:13:43,713 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 175 transitions. Word has length 14 [2022-03-15 22:13:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:43,713 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 175 transitions. [2022-03-15 22:13:43,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) 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 22:13:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 175 transitions. [2022-03-15 22:13:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 22:13:43,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:43,714 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:43,731 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 22:13:43,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 22:13:43,923 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash -662346506, now seen corresponding path program 14 times [2022-03-15 22:13:43,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:43,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733563237] [2022-03-15 22:13:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:43,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:44,061 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 22:13:44,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:44,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733563237] [2022-03-15 22:13:44,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733563237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:44,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544237056] [2022-03-15 22:13:44,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:13:44,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:44,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:44,063 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 22:13:44,064 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 22:13:44,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:13:44,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:44,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:13:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:44,332 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 22:13:44,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:44,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544237056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:44,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:44,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2022-03-15 22:13:44,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [858836983] [2022-03-15 22:13:44,591 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:44,592 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:44,593 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 22:13:44,593 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:44,766 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [4025#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 4023#(or (< j1 M1) (= counter 0)), 4026#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 4024#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:13:44,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:13:44,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:13:44,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:13:44,767 INFO L87 Difference]: Start difference. First operand 77 states and 175 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 22:13:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:45,486 INFO L93 Difference]: Finished difference Result 158 states and 326 transitions. [2022-03-15 22:13:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:13:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 22:13:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:45,487 INFO L225 Difference]: With dead ends: 158 [2022-03-15 22:13:45,487 INFO L226 Difference]: Without dead ends: 145 [2022-03-15 22:13:45,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1235, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:13:45,488 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:45,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:13:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-15 22:13:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 82. [2022-03-15 22:13:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.3333333333333335) internal successors, (189), 81 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 189 transitions. [2022-03-15 22:13:45,491 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 189 transitions. Word has length 14 [2022-03-15 22:13:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:45,491 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 189 transitions. [2022-03-15 22:13:45,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 22:13:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 189 transitions. [2022-03-15 22:13:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 22:13:45,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:45,491 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:45,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 22:13:45,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:45,699 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash 202899454, now seen corresponding path program 15 times [2022-03-15 22:13:45,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:45,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690689097] [2022-03-15 22:13:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:45,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:45,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:45,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690689097] [2022-03-15 22:13:45,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690689097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:45,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451584153] [2022-03-15 22:13:45,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:13:45,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:45,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:45,809 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 22:13:45,810 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 22:13:45,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:13:45,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:45,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 22:13:45,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:13:45,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:13:45,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451584153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:45,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:45,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2022-03-15 22:13:45,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1300065502] [2022-03-15 22:13:45,997 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:45,997 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:45,998 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 24 transitions. [2022-03-15 22:13:45,998 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:46,092 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [4471#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 4470#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 4412#(< j2 M2)] [2022-03-15 22:13:46,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:13:46,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:13:46,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-15 22:13:46,093 INFO L87 Difference]: Start difference. First operand 82 states and 189 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 22:13:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:46,278 INFO L93 Difference]: Finished difference Result 142 states and 309 transitions. [2022-03-15 22:13:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:13:46,278 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 14 [2022-03-15 22:13:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:46,279 INFO L225 Difference]: With dead ends: 142 [2022-03-15 22:13:46,279 INFO L226 Difference]: Without dead ends: 140 [2022-03-15 22:13:46,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:13:46,279 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:46,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-15 22:13:46,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2022-03-15 22:13:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.278481012658228) internal successors, (180), 79 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 180 transitions. [2022-03-15 22:13:46,282 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 180 transitions. Word has length 14 [2022-03-15 22:13:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:46,282 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 180 transitions. [2022-03-15 22:13:46,282 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 22:13:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 180 transitions. [2022-03-15 22:13:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 22:13:46,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:46,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:46,301 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 22:13:46,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 22:13:46,491 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1508587408, now seen corresponding path program 16 times [2022-03-15 22:13:46,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:46,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087214874] [2022-03-15 22:13:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:46,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:46,633 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 22:13:46,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:46,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087214874] [2022-03-15 22:13:46,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087214874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:46,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156453211] [2022-03-15 22:13:46,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:13:46,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:46,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:46,635 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 22:13:46,636 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 22:13:46,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:13:46,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:46,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:13:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:46,925 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 22:13:46,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:47,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156453211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:47,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:47,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2022-03-15 22:13:47,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [276110745] [2022-03-15 22:13:47,133 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:47,133 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:47,134 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2022-03-15 22:13:47,134 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:47,347 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [4894#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 4892#(or (< j1 M1) (= counter 0)), 4895#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 4893#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:13:47,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:13:47,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:47,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:13:47,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:13:47,348 INFO L87 Difference]: Start difference. First operand 80 states and 180 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) 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 22:13:48,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:48,305 INFO L93 Difference]: Finished difference Result 178 states and 378 transitions. [2022-03-15 22:13:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:13:48,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) 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 14 [2022-03-15 22:13:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:48,306 INFO L225 Difference]: With dead ends: 178 [2022-03-15 22:13:48,307 INFO L226 Difference]: Without dead ends: 171 [2022-03-15 22:13:48,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=338, Invalid=1824, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:13:48,307 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:48,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:13:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-15 22:13:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 92. [2022-03-15 22:13:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.340659340659341) internal successors, (213), 91 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 213 transitions. [2022-03-15 22:13:48,310 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 213 transitions. Word has length 14 [2022-03-15 22:13:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:48,310 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 213 transitions. [2022-03-15 22:13:48,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) 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 22:13:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 213 transitions. [2022-03-15 22:13:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:13:48,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:48,311 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:48,329 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 22:13:48,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 22:13:48,527 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1589924232, now seen corresponding path program 17 times [2022-03-15 22:13:48,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:48,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789783497] [2022-03-15 22:13:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:48,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:48,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:48,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789783497] [2022-03-15 22:13:48,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789783497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:48,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806190222] [2022-03-15 22:13:48,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:13:48,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:48,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:48,664 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 22:13:48,665 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 22:13:48,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 22:13:48,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:48,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:13:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:48,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:49,189 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 22:13:49,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806190222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:49,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:49,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2022-03-15 22:13:49,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [337511804] [2022-03-15 22:13:49,190 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:49,191 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:49,192 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 43 transitions. [2022-03-15 22:13:49,192 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:49,816 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [5412#(or (< j1 M1) (<= (+ j2 1) M2)), 5418#(and (or (< (+ 2 j1) M1) (<= M2 (+ 3 j2)) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= (+ 3 j2) M2) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= C counter) (not (< (+ j1 1) M1)))), 5415#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2)))), 5416#(and (or (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (* 3 C) counter)) (or (< j1 M1) (<= M2 (+ 3 j2)))), 5413#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 5419#(and (or (<= M2 (+ 3 j2)) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (<= (+ 3 j2) M2) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)))), 5411#(< j1 M1), 5414#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 5417#(and (or (not (< j1 M1)) (<= M2 (+ 3 j2)) (< (+ j1 1) M1)) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= (+ 3 j2) M2) (< (+ j1 1) M1)))] [2022-03-15 22:13:49,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:13:49,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:13:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:13:49,817 INFO L87 Difference]: Start difference. First operand 92 states and 213 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:50,723 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2022-03-15 22:13:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:13:50,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 22:13:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:50,724 INFO L225 Difference]: With dead ends: 156 [2022-03-15 22:13:50,724 INFO L226 Difference]: Without dead ends: 156 [2022-03-15 22:13:50,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=2484, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:13:50,726 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 113 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:50,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 0 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:50,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-15 22:13:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 95. [2022-03-15 22:13:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.3404255319148937) internal successors, (220), 94 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 220 transitions. [2022-03-15 22:13:50,729 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 220 transitions. Word has length 15 [2022-03-15 22:13:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:50,729 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 220 transitions. [2022-03-15 22:13:50,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 220 transitions. [2022-03-15 22:13:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:13:50,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:50,730 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:50,747 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 22:13:50,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:50,943 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:50,943 INFO L85 PathProgramCache]: Analyzing trace with hash -195681323, now seen corresponding path program 18 times [2022-03-15 22:13:50,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:50,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886510020] [2022-03-15 22:13:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:50,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:51,017 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 22:13:51,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:51,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886510020] [2022-03-15 22:13:51,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886510020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:51,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844152659] [2022-03-15 22:13:51,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:13:51,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:51,020 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 22:13:51,021 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 22:13:51,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:13:51,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:51,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:13:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:51,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:51,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844152659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:51,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:51,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2022-03-15 22:13:51,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [99514496] [2022-03-15 22:13:51,645 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:51,646 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:51,648 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 41 transitions. [2022-03-15 22:13:51,648 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:51,880 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [5920#(or (<= M1 (+ 3 j1)) (< (+ j1 4) M1) (<= (+ j2 4) M2)), 5914#(or (< j1 M1) (<= (+ 2 j2) M2)), 5915#(or (< j1 M1) (<= (+ 3 j2) M2)), 5912#(< j1 M1), 5917#(or (< (+ j1 1) M1) (<= M1 j1) (<= (+ j2 4) M2)), 5919#(or (<= M1 (+ 2 j1)) (< (+ 3 j1) M1) (<= (+ j2 4) M2)), 5913#(or (< j1 M1) (<= (+ j2 1) M2)), 5916#(or (< j1 M1) (<= (+ j2 4) M2)), 5918#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ j2 4) M2))] [2022-03-15 22:13:51,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:13:51,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:51,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:13:51,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:13:51,881 INFO L87 Difference]: Start difference. First operand 95 states and 220 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:52,176 INFO L93 Difference]: Finished difference Result 208 states and 416 transitions. [2022-03-15 22:13:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:13:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 22:13:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:52,177 INFO L225 Difference]: With dead ends: 208 [2022-03-15 22:13:52,177 INFO L226 Difference]: Without dead ends: 208 [2022-03-15 22:13:52,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=509, Invalid=1843, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:13:52,179 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:52,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-15 22:13:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 103. [2022-03-15 22:13:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.4019607843137254) internal successors, (245), 102 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 245 transitions. [2022-03-15 22:13:52,186 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 245 transitions. Word has length 15 [2022-03-15 22:13:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:52,186 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 245 transitions. [2022-03-15 22:13:52,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 245 transitions. [2022-03-15 22:13:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:13:52,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:52,189 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:52,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 22:13:52,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:52,405 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1443983265, now seen corresponding path program 19 times [2022-03-15 22:13:52,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:52,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027985014] [2022-03-15 22:13:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:52,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:52,461 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 22:13:52,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:52,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027985014] [2022-03-15 22:13:52,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027985014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:52,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628101819] [2022-03-15 22:13:52,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:13:52,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:52,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:52,472 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 22:13:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:13:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:52,517 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 22:13:52,699 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 22:13:52,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:52,896 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 22:13:52,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628101819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:52,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:52,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2022-03-15 22:13:52,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [929353012] [2022-03-15 22:13:52,896 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:52,897 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:52,898 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 22:13:52,898 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:52,998 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [6472#(and (or (<= M1 (+ 2 j1)) (<= j2 j1)) (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0))), 6471#(and (or (<= M1 (+ j1 1)) (<= (+ j2 1) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 6470#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= (+ 2 j2) j1) (<= M1 j1))), 6469#(< j2 M2)] [2022-03-15 22:13:52,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 22:13:52,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 22:13:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:13:52,998 INFO L87 Difference]: Start difference. First operand 103 states and 245 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 22:13:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:53,137 INFO L93 Difference]: Finished difference Result 143 states and 306 transitions. [2022-03-15 22:13:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:13:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 22:13:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:53,138 INFO L225 Difference]: With dead ends: 143 [2022-03-15 22:13:53,138 INFO L226 Difference]: Without dead ends: 142 [2022-03-15 22:13:53,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:13:53,138 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:53,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-15 22:13:53,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 97. [2022-03-15 22:13:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.34375) internal successors, (225), 96 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 225 transitions. [2022-03-15 22:13:53,141 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 225 transitions. Word has length 15 [2022-03-15 22:13:53,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:53,141 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 225 transitions. [2022-03-15 22:13:53,141 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 22:13:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 225 transitions. [2022-03-15 22:13:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:13:53,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:53,141 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:53,157 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 22:13:53,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:53,351 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:53,352 INFO L85 PathProgramCache]: Analyzing trace with hash -649467352, now seen corresponding path program 20 times [2022-03-15 22:13:53,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:53,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308678726] [2022-03-15 22:13:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:53,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:53,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:53,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308678726] [2022-03-15 22:13:53,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308678726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:53,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212274520] [2022-03-15 22:13:53,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:13:53,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:53,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:53,501 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 22:13:53,506 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 22:13:53,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:13:53,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:53,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:13:53,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:53,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:13:53,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212274520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:53,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:53,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 20 [2022-03-15 22:13:53,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1797759342] [2022-03-15 22:13:53,852 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:53,853 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:53,854 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 35 transitions. [2022-03-15 22:13:53,854 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:54,169 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [6939#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 6935#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 6937#(< j1 M1), 6938#(or (< j1 M1) (<= (+ j2 1) M2)), 6940#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 6936#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:13:54,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:13:54,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:54,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:13:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:13:54,170 INFO L87 Difference]: Start difference. First operand 97 states and 225 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 22:13:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:54,827 INFO L93 Difference]: Finished difference Result 184 states and 396 transitions. [2022-03-15 22:13:54,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:13:54,827 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 15 [2022-03-15 22:13:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:54,828 INFO L225 Difference]: With dead ends: 184 [2022-03-15 22:13:54,828 INFO L226 Difference]: Without dead ends: 184 [2022-03-15 22:13:54,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=1650, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:13:54,829 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:54,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:13:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-15 22:13:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 99. [2022-03-15 22:13:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.357142857142857) internal successors, (231), 98 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 231 transitions. [2022-03-15 22:13:54,832 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 231 transitions. Word has length 15 [2022-03-15 22:13:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:54,832 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 231 transitions. [2022-03-15 22:13:54,832 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 22:13:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 231 transitions. [2022-03-15 22:13:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:13:54,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:54,832 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:54,848 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 22:13:55,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-15 22:13:55,033 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:55,033 INFO L85 PathProgramCache]: Analyzing trace with hash 942216756, now seen corresponding path program 21 times [2022-03-15 22:13:55,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:55,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900973241] [2022-03-15 22:13:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:55,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:55,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900973241] [2022-03-15 22:13:55,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900973241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:55,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521268414] [2022-03-15 22:13:55,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:13:55,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:55,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:55,173 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 22:13:55,173 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 22:13:55,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:13:55,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:55,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 22:13:55,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:55,356 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 22:13:55,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:13:55,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521268414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:55,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:55,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 20 [2022-03-15 22:13:55,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [933511157] [2022-03-15 22:13:55,478 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:55,479 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:55,480 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2022-03-15 22:13:55,480 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:55,705 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [7462#(< j1 M1), 7464#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 7466#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 7463#(or (< j1 M1) (<= (+ j2 1) M2)), 7465#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:13:55,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:13:55,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:13:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:13:55,706 INFO L87 Difference]: Start difference. First operand 99 states and 231 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 22:13:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:56,453 INFO L93 Difference]: Finished difference Result 182 states and 393 transitions. [2022-03-15 22:13:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:13:56,453 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 15 [2022-03-15 22:13:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:56,455 INFO L225 Difference]: With dead ends: 182 [2022-03-15 22:13:56,455 INFO L226 Difference]: Without dead ends: 182 [2022-03-15 22:13:56,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:13:56,455 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:56,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:13:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-15 22:13:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 103. [2022-03-15 22:13:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.3823529411764706) internal successors, (243), 102 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 243 transitions. [2022-03-15 22:13:56,459 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 243 transitions. Word has length 15 [2022-03-15 22:13:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:56,460 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 243 transitions. [2022-03-15 22:13:56,460 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 22:13:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 243 transitions. [2022-03-15 22:13:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:13:56,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:56,461 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:56,477 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 22:13:56,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 22:13:56,675 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:56,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:56,676 INFO L85 PathProgramCache]: Analyzing trace with hash 300824744, now seen corresponding path program 22 times [2022-03-15 22:13:56,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:56,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250481815] [2022-03-15 22:13:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:56,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:56,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:56,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250481815] [2022-03-15 22:13:56,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250481815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:56,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195217990] [2022-03-15 22:13:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:13:56,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:56,835 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 22:13:56,836 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 22:13:56,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:13:56,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:56,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:13:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:57,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:57,490 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 22:13:57,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195217990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:57,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:57,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 22 [2022-03-15 22:13:57,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [842889773] [2022-03-15 22:13:57,490 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:57,491 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:57,492 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 22:13:57,492 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:57,663 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [8000#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 8001#(or (< j1 M1) (= counter 0)), 7999#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 8002#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:13:57,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:13:57,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:13:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:13:57,664 INFO L87 Difference]: Start difference. First operand 103 states and 243 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 22:13:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:58,510 INFO L93 Difference]: Finished difference Result 188 states and 403 transitions. [2022-03-15 22:13:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:13:58,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 22:13:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:58,512 INFO L225 Difference]: With dead ends: 188 [2022-03-15 22:13:58,512 INFO L226 Difference]: Without dead ends: 181 [2022-03-15 22:13:58,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:13:58,513 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:58,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-15 22:13:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 104. [2022-03-15 22:13:58,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.3883495145631066) internal successors, (246), 103 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:58,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 246 transitions. [2022-03-15 22:13:58,515 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 246 transitions. Word has length 15 [2022-03-15 22:13:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:58,515 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 246 transitions. [2022-03-15 22:13:58,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 22:13:58,516 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 246 transitions. [2022-03-15 22:13:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:13:58,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:58,516 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:58,534 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 22:13:58,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:58,723 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:58,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:58,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1166070704, now seen corresponding path program 23 times [2022-03-15 22:13:58,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:58,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508024299] [2022-03-15 22:13:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:58,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:58,856 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 22:13:58,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:58,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508024299] [2022-03-15 22:13:58,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508024299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:58,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913213037] [2022-03-15 22:13:58,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:13:58,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:58,876 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 22:13:58,910 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 22:13:58,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:13:58,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:58,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:13:58,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:59,207 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 22:13:59,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:59,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913213037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:59,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:59,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2022-03-15 22:13:59,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [355751775] [2022-03-15 22:13:59,483 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:59,484 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:59,485 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2022-03-15 22:13:59,485 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:59,567 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [8544#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 8543#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 8545#(< j2 M2)] [2022-03-15 22:13:59,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:13:59,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:59,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:13:59,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:13:59,568 INFO L87 Difference]: Start difference. First operand 104 states and 246 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 22:13:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:59,752 INFO L93 Difference]: Finished difference Result 165 states and 373 transitions. [2022-03-15 22:13:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:13:59,761 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 15 [2022-03-15 22:13:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:59,762 INFO L225 Difference]: With dead ends: 165 [2022-03-15 22:13:59,762 INFO L226 Difference]: Without dead ends: 164 [2022-03-15 22:13:59,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=1337, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:13:59,762 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:59,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:13:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-15 22:13:59,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2022-03-15 22:13:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.3846153846153846) internal successors, (248), 104 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 248 transitions. [2022-03-15 22:13:59,768 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 248 transitions. Word has length 15 [2022-03-15 22:13:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:59,768 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 248 transitions. [2022-03-15 22:13:59,768 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 22:13:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 248 transitions. [2022-03-15 22:13:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:13:59,768 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:59,768 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:59,786 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 22:13:59,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:59,969 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:59,969 INFO L85 PathProgramCache]: Analyzing trace with hash -478308646, now seen corresponding path program 24 times [2022-03-15 22:13:59,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:59,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001098527] [2022-03-15 22:13:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:59,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:00,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:00,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001098527] [2022-03-15 22:14:00,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001098527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:00,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811662538] [2022-03-15 22:14:00,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:14:00,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:00,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:00,143 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 22:14:00,144 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 22:14:00,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:14:00,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:00,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:14:00,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:00,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:00,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811662538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:00,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:00,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2022-03-15 22:14:00,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2018948499] [2022-03-15 22:14:00,502 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:00,502 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:00,504 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 33 transitions. [2022-03-15 22:14:00,504 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:00,732 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [9049#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 9048#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 9045#(< j1 M1), 9047#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 9046#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:14:00,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:14:00,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:00,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:14:00,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:14:00,734 INFO L87 Difference]: Start difference. First operand 105 states and 248 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 22:14:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:01,121 INFO L93 Difference]: Finished difference Result 137 states and 316 transitions. [2022-03-15 22:14:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:14:01,121 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 15 [2022-03-15 22:14:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:01,122 INFO L225 Difference]: With dead ends: 137 [2022-03-15 22:14:01,122 INFO L226 Difference]: Without dead ends: 137 [2022-03-15 22:14:01,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:14:01,129 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:01,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:14:01,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-15 22:14:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 109. [2022-03-15 22:14:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.4074074074074074) internal successors, (260), 108 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 260 transitions. [2022-03-15 22:14:01,135 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 260 transitions. Word has length 15 [2022-03-15 22:14:01,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:01,135 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 260 transitions. [2022-03-15 22:14:01,135 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 22:14:01,135 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 260 transitions. [2022-03-15 22:14:01,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:14:01,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:01,136 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:01,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 22:14:01,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 22:14:01,352 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash 471983450, now seen corresponding path program 25 times [2022-03-15 22:14:01,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:01,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220286534] [2022-03-15 22:14:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:01,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:01,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:01,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220286534] [2022-03-15 22:14:01,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220286534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:01,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550745583] [2022-03-15 22:14:01,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:14:01,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:01,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:01,519 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 22:14:01,520 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 22:14:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:01,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:14:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:01,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:02,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550745583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:02,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:02,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 22 [2022-03-15 22:14:02,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1842345565] [2022-03-15 22:14:02,032 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:02,033 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:02,034 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2022-03-15 22:14:02,034 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:02,126 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [9532#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 9533#(or (< j2 M2) (< j1 M1) (= counter 0)), 9531#(or (< j1 M1) (= counter 0))] [2022-03-15 22:14:02,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:14:02,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:14:02,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:14:02,127 INFO L87 Difference]: Start difference. First operand 109 states and 260 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 22:14:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:02,619 INFO L93 Difference]: Finished difference Result 161 states and 360 transitions. [2022-03-15 22:14:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:14:02,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 22:14:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:02,620 INFO L225 Difference]: With dead ends: 161 [2022-03-15 22:14:02,620 INFO L226 Difference]: Without dead ends: 153 [2022-03-15 22:14:02,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:14:02,621 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:02,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:14:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-15 22:14:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2022-03-15 22:14:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.392857142857143) internal successors, (268), 112 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 268 transitions. [2022-03-15 22:14:02,624 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 268 transitions. Word has length 15 [2022-03-15 22:14:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:02,624 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 268 transitions. [2022-03-15 22:14:02,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 22:14:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 268 transitions. [2022-03-15 22:14:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:14:02,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:02,624 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:02,640 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 22:14:02,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 22:14:02,834 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1570650876, now seen corresponding path program 26 times [2022-03-15 22:14:02,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:02,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554580476] [2022-03-15 22:14:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:02,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:03,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:03,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554580476] [2022-03-15 22:14:03,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554580476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:03,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450704743] [2022-03-15 22:14:03,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:14:03,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:03,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:03,024 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 22:14:03,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 22:14:03,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:14:03,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:14:03,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:03,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:03,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450704743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:03,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:03,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 22 [2022-03-15 22:14:03,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [379813032] [2022-03-15 22:14:03,584 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:03,585 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:03,586 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 29 transitions. [2022-03-15 22:14:03,586 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:03,804 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [10054#(or (< j2 M2) (< j1 M1) (= counter 0)), 10053#(or (< j1 M1) (= counter 0)), 10056#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 10055#(and (or (< j1 M1) (<= (+ j2 1) M2)) (or (= C counter) (< j1 M1) (<= (+ 2 j2) M2)))] [2022-03-15 22:14:03,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:14:03,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:03,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:14:03,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:14:03,805 INFO L87 Difference]: Start difference. First operand 113 states and 268 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 22:14:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:04,223 INFO L93 Difference]: Finished difference Result 168 states and 380 transitions. [2022-03-15 22:14:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:14:04,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 22:14:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:04,224 INFO L225 Difference]: With dead ends: 168 [2022-03-15 22:14:04,224 INFO L226 Difference]: Without dead ends: 165 [2022-03-15 22:14:04,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:14:04,225 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:04,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:14:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-15 22:14:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 114. [2022-03-15 22:14:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.398230088495575) internal successors, (271), 113 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 271 transitions. [2022-03-15 22:14:04,227 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 271 transitions. Word has length 15 [2022-03-15 22:14:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:04,228 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 271 transitions. [2022-03-15 22:14:04,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 22:14:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 271 transitions. [2022-03-15 22:14:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:04,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:04,228 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:04,245 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 22:14:04,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 22:14:04,429 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2042888974, now seen corresponding path program 27 times [2022-03-15 22:14:04,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:04,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738164543] [2022-03-15 22:14:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:04,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:04,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:04,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738164543] [2022-03-15 22:14:04,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738164543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:04,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421124425] [2022-03-15 22:14:04,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:14:04,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:04,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:04,570 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 22:14:04,571 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 22:14:04,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:14:04,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:14:04,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:04,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:04,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421124425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:04,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:04,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-15 22:14:04,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1865002198] [2022-03-15 22:14:04,877 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:04,878 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:04,880 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 48 transitions. [2022-03-15 22:14:04,880 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:05,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [10591#(and (or (<= M2 j2) (<= counter 0) (< j1 M1)) (or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2))), 10592#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2))), 10593#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2)))), 10594#(and (or (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (* 3 C) counter)) (or (< j1 M1) (<= M2 (+ 3 j2)))), 10596#(and (or (< (+ 2 j1) M1) (<= M2 (+ 3 j2)) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= (+ 3 j2) M2) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= C counter) (not (< (+ j1 1) M1)))), 10589#(or (< j1 M1) (<= (+ j2 1) M2)), 10595#(and (or (not (< j1 M1)) (<= M2 (+ 3 j2)) (< (+ j1 1) M1)) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= (+ 3 j2) M2) (< (+ j1 1) M1))), 10597#(and (or (<= M2 (+ 3 j2)) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (<= (+ 3 j2) M2) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)))), 10588#(< j1 M1), 10590#(or (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:14:05,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:14:05,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:14:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:14:05,483 INFO L87 Difference]: Start difference. First operand 114 states and 271 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 22:14:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:06,320 INFO L93 Difference]: Finished difference Result 183 states and 392 transitions. [2022-03-15 22:14:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:14:06,320 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 16 [2022-03-15 22:14:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:06,321 INFO L225 Difference]: With dead ends: 183 [2022-03-15 22:14:06,321 INFO L226 Difference]: Without dead ends: 160 [2022-03-15 22:14:06,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:14:06,322 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:06,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:14:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-15 22:14:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2022-03-15 22:14:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.398230088495575) internal successors, (271), 113 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 271 transitions. [2022-03-15 22:14:06,324 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 271 transitions. Word has length 16 [2022-03-15 22:14:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:06,325 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 271 transitions. [2022-03-15 22:14:06,325 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 22:14:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 271 transitions. [2022-03-15 22:14:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:06,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:06,325 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:06,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-15 22:14:06,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 22:14:06,526 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1771031755, now seen corresponding path program 28 times [2022-03-15 22:14:06,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:06,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519062762] [2022-03-15 22:14:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:06,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:06,714 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 22:14:06,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:06,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519062762] [2022-03-15 22:14:06,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519062762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:06,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246478700] [2022-03-15 22:14:06,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:14:06,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:06,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:06,715 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 22:14:06,716 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 22:14:06,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:14:06,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:06,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:14:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:06,951 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 22:14:06,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:07,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246478700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:07,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:07,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2022-03-15 22:14:07,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1856818757] [2022-03-15 22:14:07,152 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:07,153 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:07,155 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 46 transitions. [2022-03-15 22:14:07,155 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:07,956 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [11168#(and (or (< j1 M1) (<= (* C 4) counter)) (or (< j1 M1) (<= (+ j2 4) M2)) (or (< j1 M1) (<= counter (* C 4)))), 11166#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 11163#(or (< j1 M1) (= counter 0)), 11169#(and (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (+ j2 4) M2)) (or (not (< j1 M1)) (<= counter (* 3 C)) (< (+ j1 1) M1)) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (* 3 C) counter))), 11165#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 11164#(or (< j2 M2) (< j1 M1) (= counter 0)), 11172#(and (or (not (< (+ 3 j1) M1)) (<= counter 0) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (<= 0 counter) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (< (+ j1 4) M1) (<= (+ j2 4) M2))), 11167#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 11170#(and (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= (+ j2 4) M2)) (or (< (+ 2 j1) M1) (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= (* 2 C) counter))), 11171#(and (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= counter C)) (or (< (+ 3 j1) M1) (<= C counter) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= (+ j2 4) M2)))] [2022-03-15 22:14:07,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:14:07,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:07,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:14:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:14:07,957 INFO L87 Difference]: Start difference. First operand 114 states and 271 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:09,071 INFO L93 Difference]: Finished difference Result 263 states and 577 transitions. [2022-03-15 22:14:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:14:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 22:14:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:09,072 INFO L225 Difference]: With dead ends: 263 [2022-03-15 22:14:09,072 INFO L226 Difference]: Without dead ends: 256 [2022-03-15 22:14:09,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 22:14:09,074 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 139 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:09,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 0 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:14:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-15 22:14:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 126. [2022-03-15 22:14:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.416) internal successors, (302), 125 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 302 transitions. [2022-03-15 22:14:09,077 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 302 transitions. Word has length 16 [2022-03-15 22:14:09,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:09,077 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 302 transitions. [2022-03-15 22:14:09,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 302 transitions. [2022-03-15 22:14:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:09,078 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:09,078 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:09,094 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 22:14:09,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:09,294 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash -830574875, now seen corresponding path program 29 times [2022-03-15 22:14:09,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:09,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362872372] [2022-03-15 22:14:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:09,478 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 22:14:09,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:09,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362872372] [2022-03-15 22:14:09,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362872372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:09,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511491877] [2022-03-15 22:14:09,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:14:09,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:09,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:09,480 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 22:14:09,480 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 22:14:09,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 22:14:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 22:14:09,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:09,894 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 22:14:09,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:11,087 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 22:14:11,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511491877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:11,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:11,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-03-15 22:14:11,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1747916775] [2022-03-15 22:14:11,087 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:11,088 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:11,090 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 38 transitions. [2022-03-15 22:14:11,090 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:11,588 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [11852#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 11849#(or (< j2 M2) (< j1 M1) (= counter 0)), 11853#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 11850#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 11848#(or (< j1 M1) (= counter 0)), 11854#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 11851#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1))))] [2022-03-15 22:14:11,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:14:11,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:11,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:14:11,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:14:11,589 INFO L87 Difference]: Start difference. First operand 126 states and 302 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) 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 22:14:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:13,720 INFO L93 Difference]: Finished difference Result 305 states and 640 transitions. [2022-03-15 22:14:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 22:14:13,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) 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 16 [2022-03-15 22:14:13,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:13,722 INFO L225 Difference]: With dead ends: 305 [2022-03-15 22:14:13,722 INFO L226 Difference]: Without dead ends: 295 [2022-03-15 22:14:13,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=875, Invalid=4095, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 22:14:13,723 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:13,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 0 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:14:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-15 22:14:13,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 132. [2022-03-15 22:14:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.427480916030534) internal successors, (318), 131 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 318 transitions. [2022-03-15 22:14:13,726 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 318 transitions. Word has length 16 [2022-03-15 22:14:13,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:13,726 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 318 transitions. [2022-03-15 22:14:13,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) 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 22:14:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 318 transitions. [2022-03-15 22:14:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:13,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:13,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:13,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 22:14:13,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:13,927 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash 761109233, now seen corresponding path program 30 times [2022-03-15 22:14:13,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:13,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57412590] [2022-03-15 22:14:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:13,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:14,102 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 22:14:14,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:14,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57412590] [2022-03-15 22:14:14,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57412590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:14,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661384580] [2022-03-15 22:14:14,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:14:14,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:14,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:14,103 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 22:14:14,105 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 22:14:14,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:14:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:14:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:14,406 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 22:14:14,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:14,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661384580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:14,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:14,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2022-03-15 22:14:14,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [244509368] [2022-03-15 22:14:14,603 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:14,604 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:14,606 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 34 transitions. [2022-03-15 22:14:14,606 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:14,889 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [12610#(or (< j2 M2) (< j1 M1) (= counter 0)), 12613#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 12614#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 12609#(or (< j1 M1) (= counter 0)), 12612#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 12611#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1))))] [2022-03-15 22:14:14,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:14:14,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:14,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:14:14,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:14:14,890 INFO L87 Difference]: Start difference. First operand 132 states and 318 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) 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 22:14:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:16,306 INFO L93 Difference]: Finished difference Result 303 states and 628 transitions. [2022-03-15 22:14:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:14:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) 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 16 [2022-03-15 22:14:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:16,311 INFO L225 Difference]: With dead ends: 303 [2022-03-15 22:14:16,311 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 22:14:16,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=492, Invalid=2814, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 22:14:16,312 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:16,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 0 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:14:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 22:14:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 135. [2022-03-15 22:14:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.462686567164179) internal successors, (330), 134 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 22:14:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 330 transitions. [2022-03-15 22:14:16,330 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 330 transitions. Word has length 16 [2022-03-15 22:14:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:16,330 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 330 transitions. [2022-03-15 22:14:16,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) 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 22:14:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 330 transitions. [2022-03-15 22:14:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:16,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:16,330 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:16,346 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 22:14:16,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-15 22:14:16,531 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash 119717221, now seen corresponding path program 31 times [2022-03-15 22:14:16,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:16,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824368998] [2022-03-15 22:14:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:16,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:16,704 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 22:14:16,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:16,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824368998] [2022-03-15 22:14:16,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824368998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:16,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371801032] [2022-03-15 22:14:16,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:14:16,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:16,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:16,705 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 22:14:16,706 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 22:14:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:16,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:14:16,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:16,964 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 22:14:16,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:17,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371801032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:17,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:17,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2022-03-15 22:14:17,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [136254747] [2022-03-15 22:14:17,349 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:17,349 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:17,351 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2022-03-15 22:14:17,351 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:17,557 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [13359#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 13360#(or (< j2 M2) (< j1 M1) (= counter 0)), 13358#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 13357#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 13356#(or (< j1 M1) (= counter 0))] [2022-03-15 22:14:17,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:14:17,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:17,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:14:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:14:17,558 INFO L87 Difference]: Start difference. First operand 135 states and 330 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 22:14:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:19,571 INFO L93 Difference]: Finished difference Result 365 states and 753 transitions. [2022-03-15 22:14:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 22:14:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 22:14:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:19,572 INFO L225 Difference]: With dead ends: 365 [2022-03-15 22:14:19,572 INFO L226 Difference]: Without dead ends: 354 [2022-03-15 22:14:19,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=628, Invalid=3532, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:14:19,573 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:19,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 0 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:14:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-03-15 22:14:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 147. [2022-03-15 22:14:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.5547945205479454) internal successors, (373), 146 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 373 transitions. [2022-03-15 22:14:19,577 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 373 transitions. Word has length 16 [2022-03-15 22:14:19,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:19,577 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 373 transitions. [2022-03-15 22:14:19,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 22:14:19,577 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 373 transitions. [2022-03-15 22:14:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:19,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:19,577 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:19,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 22:14:19,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:19,791 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:19,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:19,792 INFO L85 PathProgramCache]: Analyzing trace with hash 984963181, now seen corresponding path program 32 times [2022-03-15 22:14:19,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:19,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185951590] [2022-03-15 22:14:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:19,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:19,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:19,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185951590] [2022-03-15 22:14:19,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185951590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:19,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192349710] [2022-03-15 22:14:19,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:14:19,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:19,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:19,888 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 22:14:19,889 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 22:14:19,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:14:19,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 22:14:19,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:20,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:20,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192349710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:20,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:20,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-03-15 22:14:20,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [761393194] [2022-03-15 22:14:20,093 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:20,094 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:20,095 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 22:14:20,095 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:20,196 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [14199#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 14197#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 14131#(< j2 M2), 14198#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:14:20,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:14:20,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:20,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:14:20,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:14:20,196 INFO L87 Difference]: Start difference. First operand 147 states and 373 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 22:14:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:20,444 INFO L93 Difference]: Finished difference Result 268 states and 648 transitions. [2022-03-15 22:14:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:14:20,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 22:14:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:20,445 INFO L225 Difference]: With dead ends: 268 [2022-03-15 22:14:20,445 INFO L226 Difference]: Without dead ends: 266 [2022-03-15 22:14:20,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:14:20,445 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:20,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:14:20,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-15 22:14:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 153. [2022-03-15 22:14:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5723684210526314) internal successors, (391), 152 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 391 transitions. [2022-03-15 22:14:20,448 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 391 transitions. Word has length 16 [2022-03-15 22:14:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:20,448 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 391 transitions. [2022-03-15 22:14:20,448 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 22:14:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 391 transitions. [2022-03-15 22:14:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:20,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:20,449 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:20,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 22:14:20,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:20,664 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1341470530, now seen corresponding path program 33 times [2022-03-15 22:14:20,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:20,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248220090] [2022-03-15 22:14:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:20,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:20,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:20,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248220090] [2022-03-15 22:14:20,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248220090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:20,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292136506] [2022-03-15 22:14:20,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:14:20,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:20,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:20,809 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 22:14:20,810 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 22:14:20,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 22:14:20,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:20,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:14:20,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:21,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:14:36,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292136506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:36,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:36,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 23 [2022-03-15 22:14:36,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1985842338] [2022-03-15 22:14:36,123 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:36,124 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:36,126 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 40 transitions. [2022-03-15 22:14:36,126 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:36,562 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [14922#(or (< j1 M1) (<= (+ 2 j2) M2)), 14919#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 14923#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 14921#(or (< j1 M1) (<= (+ j2 1) M2)), 14920#(< j1 M1), 14924#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2))), 14918#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:14:36,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:14:36,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:36,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:14:36,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:14:36,562 INFO L87 Difference]: Start difference. First operand 153 states and 391 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 22:14:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:37,264 INFO L93 Difference]: Finished difference Result 236 states and 561 transitions. [2022-03-15 22:14:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:14:37,265 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 16 [2022-03-15 22:14:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:37,265 INFO L225 Difference]: With dead ends: 236 [2022-03-15 22:14:37,265 INFO L226 Difference]: Without dead ends: 236 [2022-03-15 22:14:37,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:14:37,266 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:37,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:14:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-15 22:14:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 156. [2022-03-15 22:14:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.587096774193548) internal successors, (401), 155 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 22:14:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 401 transitions. [2022-03-15 22:14:37,269 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 401 transitions. Word has length 16 [2022-03-15 22:14:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:37,269 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 401 transitions. [2022-03-15 22:14:37,269 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 22:14:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 401 transitions. [2022-03-15 22:14:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:37,269 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:37,269 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:37,289 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 22:14:37,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-15 22:14:37,479 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash -659416169, now seen corresponding path program 34 times [2022-03-15 22:14:37,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:37,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987798948] [2022-03-15 22:14:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:37,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:37,785 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 22:14:37,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:37,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987798948] [2022-03-15 22:14:37,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987798948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:37,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747187463] [2022-03-15 22:14:37,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:14:37,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:37,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:37,787 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 22:14:37,788 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 22:14:37,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:14:37,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:37,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:14:37,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:38,213 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 22:14:38,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:38,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747187463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:38,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:38,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 24 [2022-03-15 22:14:38,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2096524039] [2022-03-15 22:14:38,442 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:38,443 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:38,444 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2022-03-15 22:14:38,444 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:38,919 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [15622#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 15625#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 15623#(or (< j1 M1) (= counter 0)), 15624#(or (< j2 M2) (< j1 M1) (= counter 0)), 15621#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 15626#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter)))] [2022-03-15 22:14:38,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:14:38,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:38,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:14:38,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:14:38,920 INFO L87 Difference]: Start difference. First operand 156 states and 401 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:41,642 INFO L93 Difference]: Finished difference Result 368 states and 808 transitions. [2022-03-15 22:14:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 22:14:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 22:14:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:41,644 INFO L225 Difference]: With dead ends: 368 [2022-03-15 22:14:41,644 INFO L226 Difference]: Without dead ends: 361 [2022-03-15 22:14:41,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=731, Invalid=4671, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 22:14:41,645 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 118 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:41,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 0 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:14:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-15 22:14:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 158. [2022-03-15 22:14:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.5923566878980893) internal successors, (407), 157 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 407 transitions. [2022-03-15 22:14:41,648 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 407 transitions. Word has length 16 [2022-03-15 22:14:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:41,648 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 407 transitions. [2022-03-15 22:14:41,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 407 transitions. [2022-03-15 22:14:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:41,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:41,649 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:41,664 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 22:14:41,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 22:14:41,849 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1156121887, now seen corresponding path program 35 times [2022-03-15 22:14:41,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:41,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027457528] [2022-03-15 22:14:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:41,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:41,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:41,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027457528] [2022-03-15 22:14:41,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027457528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:41,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999487795] [2022-03-15 22:14:41,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:14:41,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:41,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:41,986 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 22:14:41,987 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 22:14:42,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:14:42,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:42,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 22:14:42,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:42,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:14:42,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999487795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:42,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:42,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2022-03-15 22:14:42,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1223316306] [2022-03-15 22:14:42,294 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:42,294 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:42,296 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 26 transitions. [2022-03-15 22:14:42,296 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:42,373 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [16505#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 16441#(< j2 M2), 16506#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:14:42,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:14:42,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:42,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:14:42,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-15 22:14:42,373 INFO L87 Difference]: Start difference. First operand 158 states and 407 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 22:14:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:42,549 INFO L93 Difference]: Finished difference Result 281 states and 685 transitions. [2022-03-15 22:14:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:14:42,550 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 16 [2022-03-15 22:14:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:42,551 INFO L225 Difference]: With dead ends: 281 [2022-03-15 22:14:42,551 INFO L226 Difference]: Without dead ends: 279 [2022-03-15 22:14:42,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:14:42,551 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:42,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:14:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-15 22:14:42,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 157. [2022-03-15 22:14:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.58974358974359) internal successors, (404), 156 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 404 transitions. [2022-03-15 22:14:42,556 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 404 transitions. Word has length 16 [2022-03-15 22:14:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:42,556 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 404 transitions. [2022-03-15 22:14:42,556 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 22:14:42,556 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 404 transitions. [2022-03-15 22:14:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:42,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:42,557 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:42,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-15 22:14:42,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 22:14:42,773 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash -855929674, now seen corresponding path program 36 times [2022-03-15 22:14:42,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:42,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213476666] [2022-03-15 22:14:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:42,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:42,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:42,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213476666] [2022-03-15 22:14:42,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213476666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:42,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313815542] [2022-03-15 22:14:42,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:14:42,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:42,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:42,947 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 22:14:42,948 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 22:14:42,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:14:42,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:42,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:14:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:43,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:43,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313815542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:43,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:43,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 24 [2022-03-15 22:14:43,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1231041866] [2022-03-15 22:14:43,411 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:43,412 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:43,414 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2022-03-15 22:14:43,414 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:43,669 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [17242#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 17238#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 17241#(or (< j1 M1) (<= (+ 2 j2) M2)), 17240#(or (< j1 M1) (<= (+ j2 1) M2)), 17237#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 17239#(< j1 M1)] [2022-03-15 22:14:43,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:14:43,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:43,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:14:43,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:14:43,670 INFO L87 Difference]: Start difference. First operand 157 states and 404 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 22:14:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:44,143 INFO L93 Difference]: Finished difference Result 243 states and 583 transitions. [2022-03-15 22:14:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:14:44,144 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 16 [2022-03-15 22:14:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:44,145 INFO L225 Difference]: With dead ends: 243 [2022-03-15 22:14:44,145 INFO L226 Difference]: Without dead ends: 243 [2022-03-15 22:14:44,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:14:44,145 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:44,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:14:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-15 22:14:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 160. [2022-03-15 22:14:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.6037735849056602) internal successors, (414), 159 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 414 transitions. [2022-03-15 22:14:44,149 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 414 transitions. Word has length 16 [2022-03-15 22:14:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:44,149 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 414 transitions. [2022-03-15 22:14:44,149 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 22:14:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 414 transitions. [2022-03-15 22:14:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:44,149 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:44,149 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:44,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 22:14:44,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:44,363 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:44,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1751758399, now seen corresponding path program 37 times [2022-03-15 22:14:44,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:44,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318612789] [2022-03-15 22:14:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:44,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:44,538 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 22:14:44,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:44,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318612789] [2022-03-15 22:14:44,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318612789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:44,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920938329] [2022-03-15 22:14:44,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:14:44,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:44,548 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 22:14:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:44,598 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 22:14:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:14:44,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:44,861 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 22:14:44,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:45,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920938329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:45,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:45,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2022-03-15 22:14:45,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [257807084] [2022-03-15 22:14:45,182 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:45,183 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:45,185 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2022-03-15 22:14:45,185 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:45,510 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [17953#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 17954#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 17952#(or (< j2 M2) (< j1 M1) (= counter 0)), 17951#(or (< j1 M1) (= counter 0)), 17955#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2)))] [2022-03-15 22:14:45,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:14:45,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:45,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:14:45,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:14:45,511 INFO L87 Difference]: Start difference. First operand 160 states and 414 transitions. Second operand has 17 states, 16 states have (on average 1.8125) 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 22:14:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:46,712 INFO L93 Difference]: Finished difference Result 330 states and 737 transitions. [2022-03-15 22:14:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:14:46,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) 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 16 [2022-03-15 22:14:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:46,713 INFO L225 Difference]: With dead ends: 330 [2022-03-15 22:14:46,713 INFO L226 Difference]: Without dead ends: 320 [2022-03-15 22:14:46,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:14:46,714 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:46,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:14:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-03-15 22:14:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 172. [2022-03-15 22:14:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.6315789473684212) internal successors, (450), 171 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 450 transitions. [2022-03-15 22:14:46,730 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 450 transitions. Word has length 16 [2022-03-15 22:14:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:46,731 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 450 transitions. [2022-03-15 22:14:46,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) 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 22:14:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 450 transitions. [2022-03-15 22:14:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:46,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:46,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:46,747 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 22:14:46,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 22:14:46,947 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:46,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1527904451, now seen corresponding path program 38 times [2022-03-15 22:14:46,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:46,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004100740] [2022-03-15 22:14:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:46,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:47,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:47,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004100740] [2022-03-15 22:14:47,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004100740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:47,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536043370] [2022-03-15 22:14:47,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:14:47,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:47,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:47,080 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 22:14:47,081 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 22:14:47,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:14:47,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:47,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 22:14:47,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:47,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:14:47,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536043370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:47,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:47,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2022-03-15 22:14:47,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1006826321] [2022-03-15 22:14:47,340 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:47,341 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:47,342 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 26 transitions. [2022-03-15 22:14:47,342 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:47,448 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [18798#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 18732#(< j2 M2), 18797#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:14:47,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:14:47,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:14:47,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-15 22:14:47,449 INFO L87 Difference]: Start difference. First operand 172 states and 450 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 22:14:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:47,685 INFO L93 Difference]: Finished difference Result 271 states and 664 transitions. [2022-03-15 22:14:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:14:47,686 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 16 [2022-03-15 22:14:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:47,687 INFO L225 Difference]: With dead ends: 271 [2022-03-15 22:14:47,687 INFO L226 Difference]: Without dead ends: 270 [2022-03-15 22:14:47,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:14:47,687 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:47,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:14:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-15 22:14:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2022-03-15 22:14:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.6470588235294117) internal successors, (495), 187 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 495 transitions. [2022-03-15 22:14:47,690 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 495 transitions. Word has length 16 [2022-03-15 22:14:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:47,691 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 495 transitions. [2022-03-15 22:14:47,691 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 22:14:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 495 transitions. [2022-03-15 22:14:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:47,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:47,691 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:47,707 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 22:14:47,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 22:14:47,899 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:47,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:47,900 INFO L85 PathProgramCache]: Analyzing trace with hash 735754434, now seen corresponding path program 39 times [2022-03-15 22:14:47,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:47,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223501465] [2022-03-15 22:14:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:47,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:48,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:48,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223501465] [2022-03-15 22:14:48,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223501465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:48,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173924606] [2022-03-15 22:14:48,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:14:48,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:48,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:48,081 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 22:14:48,082 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 22:14:48,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:14:48,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:48,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:14:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:48,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:48,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173924606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:48,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:48,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-03-15 22:14:48,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [62019188] [2022-03-15 22:14:48,445 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:48,446 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:48,447 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2022-03-15 22:14:48,447 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:48,696 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [19580#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 19579#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 19581#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 19578#(or (< j1 M1) (<= (+ j2 1) M2)), 19577#(< j1 M1)] [2022-03-15 22:14:48,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:14:48,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:48,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:14:48,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:14:48,697 INFO L87 Difference]: Start difference. First operand 188 states and 495 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 22:14:49,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:49,541 INFO L93 Difference]: Finished difference Result 303 states and 730 transitions. [2022-03-15 22:14:49,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:14:49,541 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 16 [2022-03-15 22:14:49,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:49,542 INFO L225 Difference]: With dead ends: 303 [2022-03-15 22:14:49,542 INFO L226 Difference]: Without dead ends: 303 [2022-03-15 22:14:49,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:14:49,543 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:49,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:14:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-15 22:14:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 196. [2022-03-15 22:14:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6615384615384614) internal successors, (519), 195 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 519 transitions. [2022-03-15 22:14:49,549 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 519 transitions. Word has length 16 [2022-03-15 22:14:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:49,549 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 519 transitions. [2022-03-15 22:14:49,549 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 22:14:49,549 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 519 transitions. [2022-03-15 22:14:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:49,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:49,550 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:49,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 22:14:49,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:49,760 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1648447913, now seen corresponding path program 40 times [2022-03-15 22:14:49,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:49,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924558378] [2022-03-15 22:14:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:49,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:49,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924558378] [2022-03-15 22:14:49,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924558378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:49,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391266802] [2022-03-15 22:14:49,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:14:49,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:49,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:49,903 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 22:14:49,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:14:49,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:49,947 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 22:14:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 22:14:49,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:50,233 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 22:14:50,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:50,649 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 22:14:50,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391266802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:50,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:50,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 27 [2022-03-15 22:14:50,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [84520014] [2022-03-15 22:14:50,649 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:50,650 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:50,651 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 22:14:50,651 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:50,767 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [20437#(< j1 M1), 20440#(or (< j1 M1) (<= (+ j2 1) M2)), 20439#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 20438#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:14:50,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:14:50,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:50,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:14:50,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:14:50,774 INFO L87 Difference]: Start difference. First operand 196 states and 519 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:14:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:51,145 INFO L93 Difference]: Finished difference Result 320 states and 780 transitions. [2022-03-15 22:14:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:14:51,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 22:14:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:51,148 INFO L225 Difference]: With dead ends: 320 [2022-03-15 22:14:51,149 INFO L226 Difference]: Without dead ends: 320 [2022-03-15 22:14:51,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=415, Invalid=1565, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:14:51,149 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:51,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:14:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-03-15 22:14:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 224. [2022-03-15 22:14:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.713004484304933) internal successors, (605), 223 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 605 transitions. [2022-03-15 22:14:51,158 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 605 transitions. Word has length 16 [2022-03-15 22:14:51,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:51,158 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 605 transitions. [2022-03-15 22:14:51,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:14:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 605 transitions. [2022-03-15 22:14:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:51,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:51,159 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:51,175 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 22:14:51,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 22:14:51,376 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:51,376 INFO L85 PathProgramCache]: Analyzing trace with hash 94362422, now seen corresponding path program 41 times [2022-03-15 22:14:51,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:51,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997975015] [2022-03-15 22:14:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:51,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:51,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:51,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997975015] [2022-03-15 22:14:51,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997975015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:51,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190931301] [2022-03-15 22:14:51,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:14:51,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:51,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:51,595 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 22:14:51,616 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 22:14:51,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:14:51,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:51,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:14:51,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:51,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:52,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190931301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:52,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:52,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 24 [2022-03-15 22:14:52,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [104170458] [2022-03-15 22:14:52,401 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:52,402 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:52,403 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 22:14:52,403 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:52,542 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [21354#(or (< j2 M2) (< j1 M1) (= counter 0)), 21352#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 21351#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 21353#(or (< j1 M1) (= counter 0))] [2022-03-15 22:14:52,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:14:52,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:14:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:14:52,543 INFO L87 Difference]: Start difference. First operand 224 states and 605 transitions. Second operand has 17 states, 16 states have (on average 1.625) internal successors, (26), 16 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 22:14:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:53,208 INFO L93 Difference]: Finished difference Result 289 states and 718 transitions. [2022-03-15 22:14:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:14:53,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 22:14:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:53,209 INFO L225 Difference]: With dead ends: 289 [2022-03-15 22:14:53,209 INFO L226 Difference]: Without dead ends: 282 [2022-03-15 22:14:53,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:14:53,214 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:53,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:14:53,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-15 22:14:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 221. [2022-03-15 22:14:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.7181818181818183) internal successors, (598), 220 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 598 transitions. [2022-03-15 22:14:53,218 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 598 transitions. Word has length 16 [2022-03-15 22:14:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:53,218 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 598 transitions. [2022-03-15 22:14:53,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.625) internal successors, (26), 16 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 22:14:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 598 transitions. [2022-03-15 22:14:53,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:53,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:53,219 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:53,235 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 22:14:53,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:53,435 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:53,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:53,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1942544176, now seen corresponding path program 42 times [2022-03-15 22:14:53,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:53,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013224936] [2022-03-15 22:14:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:53,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:53,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:53,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013224936] [2022-03-15 22:14:53,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013224936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:53,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560169159] [2022-03-15 22:14:53,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:14:53,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:53,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:53,636 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 22:14:53,637 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 22:14:53,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:14:53,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:53,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:14:53,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:53,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:54,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560169159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:54,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:54,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 24 [2022-03-15 22:14:54,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [54116192] [2022-03-15 22:14:54,140 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:54,141 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:54,142 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 38 transitions. [2022-03-15 22:14:54,142 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:54,520 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [22236#(or (< j1 M1) (<= (+ 2 j2) M2)), 22237#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 22233#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 22238#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2))), 22235#(or (< j1 M1) (<= (+ j2 1) M2)), 22234#(< j1 M1)] [2022-03-15 22:14:54,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:14:54,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:54,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:14:54,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:14:54,521 INFO L87 Difference]: Start difference. First operand 221 states and 598 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 22:14:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:54,983 INFO L93 Difference]: Finished difference Result 253 states and 662 transitions. [2022-03-15 22:14:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:14:54,983 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 16 [2022-03-15 22:14:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:54,984 INFO L225 Difference]: With dead ends: 253 [2022-03-15 22:14:54,984 INFO L226 Difference]: Without dead ends: 253 [2022-03-15 22:14:54,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:14:54,985 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:54,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:14:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-15 22:14:54,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 221. [2022-03-15 22:14:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.7181818181818183) internal successors, (598), 220 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 598 transitions. [2022-03-15 22:14:54,988 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 598 transitions. Word has length 16 [2022-03-15 22:14:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:54,988 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 598 transitions. [2022-03-15 22:14:54,988 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 22:14:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 598 transitions. [2022-03-15 22:14:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:54,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:54,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:55,007 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 22:14:55,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:55,189 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:55,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash 351536421, now seen corresponding path program 43 times [2022-03-15 22:14:55,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:55,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058074869] [2022-03-15 22:14:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:55,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:55,413 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 22:14:55,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:55,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058074869] [2022-03-15 22:14:55,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058074869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:55,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686444097] [2022-03-15 22:14:55,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:14:55,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:55,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:55,414 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 22:14:55,416 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 22:14:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:14:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:55,808 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 22:14:55,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:56,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686444097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:56,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:56,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2022-03-15 22:14:56,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2123791779] [2022-03-15 22:14:56,110 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:56,111 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:56,113 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 34 transitions. [2022-03-15 22:14:56,113 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:56,377 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [23068#(or (< j1 M1) (= counter 0)), 23069#(or (< j2 M2) (< j1 M1) (= counter 0)), 23070#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 23072#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 23071#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2)))] [2022-03-15 22:14:56,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:14:56,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:14:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:14:56,378 INFO L87 Difference]: Start difference. First operand 221 states and 598 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) 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 22:14:57,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:57,594 INFO L93 Difference]: Finished difference Result 438 states and 1079 transitions. [2022-03-15 22:14:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 22:14:57,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) 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 16 [2022-03-15 22:14:57,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:57,597 INFO L225 Difference]: With dead ends: 438 [2022-03-15 22:14:57,597 INFO L226 Difference]: Without dead ends: 430 [2022-03-15 22:14:57,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=526, Invalid=3380, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 22:14:57,599 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:57,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:14:57,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-03-15 22:14:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 268. [2022-03-15 22:14:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.756554307116105) internal successors, (736), 267 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 736 transitions. [2022-03-15 22:14:57,603 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 736 transitions. Word has length 16 [2022-03-15 22:14:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:57,604 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 736 transitions. [2022-03-15 22:14:57,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) 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 22:14:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 736 transitions. [2022-03-15 22:14:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:57,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:57,604 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:57,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 22:14:57,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-15 22:14:57,820 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2127892819, now seen corresponding path program 44 times [2022-03-15 22:14:57,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:57,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024898057] [2022-03-15 22:14:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:57,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:57,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:57,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024898057] [2022-03-15 22:14:57,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024898057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:57,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056626092] [2022-03-15 22:14:57,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:14:57,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:57,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:57,959 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 22:14:57,966 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 22:14:57,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:14:57,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:14:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:58,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:14:58,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056626092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:58,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:58,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2022-03-15 22:14:58,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [271820656] [2022-03-15 22:14:58,259 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:58,260 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:58,261 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2022-03-15 22:14:58,261 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:58,292 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [24219#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1)))), 24154#(< j2 M2)] [2022-03-15 22:14:58,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:14:58,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:14:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-15 22:14:58,294 INFO L87 Difference]: Start difference. First operand 268 states and 736 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 22:14:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:58,596 INFO L93 Difference]: Finished difference Result 400 states and 1006 transitions. [2022-03-15 22:14:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:14:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 22:14:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:58,598 INFO L225 Difference]: With dead ends: 400 [2022-03-15 22:14:58,598 INFO L226 Difference]: Without dead ends: 398 [2022-03-15 22:14:58,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:14:58,598 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:58,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:14:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-15 22:14:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 264. [2022-03-15 22:14:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7604562737642584) internal successors, (726), 263 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 726 transitions. [2022-03-15 22:14:58,605 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 726 transitions. Word has length 16 [2022-03-15 22:14:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:58,605 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 726 transitions. [2022-03-15 22:14:58,605 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 22:14:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 726 transitions. [2022-03-15 22:14:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:14:58,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:58,606 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:58,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 22:14:58,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 22:14:58,815 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash -637495323, now seen corresponding path program 45 times [2022-03-15 22:14:58,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:58,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534019284] [2022-03-15 22:14:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:58,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:58,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:58,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534019284] [2022-03-15 22:14:58,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534019284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:58,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887798502] [2022-03-15 22:14:58,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:14:58,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:58,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:58,940 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 22:14:58,941 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 22:14:58,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 22:14:58,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:58,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:14:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:59,278 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 22:14:59,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:59,663 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 22:14:59,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887798502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:59,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:59,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-03-15 22:14:59,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [269469641] [2022-03-15 22:14:59,663 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:59,664 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:59,665 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 26 transitions. [2022-03-15 22:14:59,665 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:59,750 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [25300#(< j1 M1), 25299#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1)))), 25301#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:14:59,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:14:59,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:59,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:14:59,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:14:59,751 INFO L87 Difference]: Start difference. First operand 264 states and 726 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22:15:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:00,244 INFO L93 Difference]: Finished difference Result 376 states and 954 transitions. [2022-03-15 22:15:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:15:00,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 16 [2022-03-15 22:15:00,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:00,246 INFO L225 Difference]: With dead ends: 376 [2022-03-15 22:15:00,246 INFO L226 Difference]: Without dead ends: 376 [2022-03-15 22:15:00,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=474, Invalid=1688, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:15:00,247 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:00,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-15 22:15:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 233. [2022-03-15 22:15:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.7413793103448274) internal successors, (636), 232 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 22:15:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 636 transitions. [2022-03-15 22:15:00,250 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 636 transitions. Word has length 16 [2022-03-15 22:15:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:00,251 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 636 transitions. [2022-03-15 22:15:00,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22:15:00,251 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 636 transitions. [2022-03-15 22:15:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:15:00,251 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:00,251 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:00,267 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 22:15:00,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 22:15:00,459 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1445414938, now seen corresponding path program 46 times [2022-03-15 22:15:00,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:00,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814985302] [2022-03-15 22:15:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:00,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:00,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:00,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814985302] [2022-03-15 22:15:00,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814985302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:00,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37675556] [2022-03-15 22:15:00,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:15:00,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:00,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:00,636 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 22:15:00,637 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 22:15:00,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:15:00,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:00,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:15:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:00,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:00,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37675556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:00,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:00,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-03-15 22:15:00,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [663616846] [2022-03-15 22:15:00,959 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:00,960 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:00,961 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 34 transitions. [2022-03-15 22:15:00,962 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:01,217 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [26289#(or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 26286#(< j1 M1), 26288#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 26287#(or (< j1 M1) (<= (+ j2 1) M2)), 26290#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:15:01,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:15:01,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:15:01,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:15:01,217 INFO L87 Difference]: Start difference. First operand 233 states and 636 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 22:15:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:01,818 INFO L93 Difference]: Finished difference Result 268 states and 699 transitions. [2022-03-15 22:15:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:15:01,819 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 16 [2022-03-15 22:15:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:01,820 INFO L225 Difference]: With dead ends: 268 [2022-03-15 22:15:01,820 INFO L226 Difference]: Without dead ends: 267 [2022-03-15 22:15:01,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:15:01,820 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:01,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-15 22:15:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 233. [2022-03-15 22:15:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.7413793103448274) internal successors, (636), 232 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 22:15:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 636 transitions. [2022-03-15 22:15:01,824 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 636 transitions. Word has length 16 [2022-03-15 22:15:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:01,824 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 636 transitions. [2022-03-15 22:15:01,824 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 22:15:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 636 transitions. [2022-03-15 22:15:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:15:01,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:01,824 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:01,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 22:15:02,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:02,027 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:02,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1312331621, now seen corresponding path program 47 times [2022-03-15 22:15:02,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:02,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262388829] [2022-03-15 22:15:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:02,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:02,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:02,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262388829] [2022-03-15 22:15:02,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262388829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:02,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631718992] [2022-03-15 22:15:02,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:15:02,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:02,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:02,112 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 22:15:02,113 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 22:15:02,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:15:02,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:02,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:15:02,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:02,530 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 22:15:02,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:03,019 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 22:15:03,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631718992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:03,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:03,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 28 [2022-03-15 22:15:03,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1781512403] [2022-03-15 22:15:03,020 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:03,020 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:03,022 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 26 transitions. [2022-03-15 22:15:03,022 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:03,090 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [27176#(or (< j1 M1) (<= (+ j2 1) M2)), 27175#(< j1 M1), 27174#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:15:03,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:15:03,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:15:03,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:15:03,091 INFO L87 Difference]: Start difference. First operand 233 states and 636 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:03,271 INFO L93 Difference]: Finished difference Result 286 states and 725 transitions. [2022-03-15 22:15:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:15:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 22:15:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:03,272 INFO L225 Difference]: With dead ends: 286 [2022-03-15 22:15:03,272 INFO L226 Difference]: Without dead ends: 286 [2022-03-15 22:15:03,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:15:03,272 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:03,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-03-15 22:15:03,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 222. [2022-03-15 22:15:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.7104072398190047) internal successors, (599), 221 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:03,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 599 transitions. [2022-03-15 22:15:03,297 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 599 transitions. Word has length 16 [2022-03-15 22:15:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:03,297 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 599 transitions. [2022-03-15 22:15:03,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 599 transitions. [2022-03-15 22:15:03,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:15:03,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:03,298 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:03,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 22:15:03,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 22:15:03,513 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash -667784958, now seen corresponding path program 48 times [2022-03-15 22:15:03,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:03,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141643690] [2022-03-15 22:15:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:03,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:03,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:03,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141643690] [2022-03-15 22:15:03,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141643690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:03,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146436579] [2022-03-15 22:15:03,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:15:03,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:03,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:03,697 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 22:15:03,698 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 22:15:03,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:15:03,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:03,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:15:03,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:03,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:04,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146436579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:04,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:04,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 22 [2022-03-15 22:15:04,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1673865326] [2022-03-15 22:15:04,072 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:04,072 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:04,074 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2022-03-15 22:15:04,074 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:04,453 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [28041#(or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 28040#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 28039#(or (< j1 M1) (<= (+ j2 1) M2)), 28038#(< j1 M1), 28042#(and (or (<= counter 0) (< j1 M1) (not (= (+ (* (- 1) C) counter) counter))) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2))))] [2022-03-15 22:15:04,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:15:04,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:04,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:15:04,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:15:04,454 INFO L87 Difference]: Start difference. First operand 222 states and 599 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 22:15:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:04,872 INFO L93 Difference]: Finished difference Result 273 states and 701 transitions. [2022-03-15 22:15:04,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:15:04,873 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 16 [2022-03-15 22:15:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:04,873 INFO L225 Difference]: With dead ends: 273 [2022-03-15 22:15:04,874 INFO L226 Difference]: Without dead ends: 272 [2022-03-15 22:15:04,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:15:04,874 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:04,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-15 22:15:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 223. [2022-03-15 22:15:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7117117117117115) internal successors, (602), 222 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 602 transitions. [2022-03-15 22:15:04,877 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 602 transitions. Word has length 16 [2022-03-15 22:15:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:04,877 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 602 transitions. [2022-03-15 22:15:04,877 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 22:15:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 602 transitions. [2022-03-15 22:15:04,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:04,878 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:04,878 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:04,901 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 22:15:05,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 22:15:05,079 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:05,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:05,079 INFO L85 PathProgramCache]: Analyzing trace with hash 932712405, now seen corresponding path program 49 times [2022-03-15 22:15:05,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:05,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475292548] [2022-03-15 22:15:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:05,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:05,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:05,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475292548] [2022-03-15 22:15:05,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475292548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:05,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44297387] [2022-03-15 22:15:05,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:15:05,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:05,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:05,252 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 22:15:05,253 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 22:15:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:05,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:15:05,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:05,477 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 22:15:05,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:05,622 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 22:15:05,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44297387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:05,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:05,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-15 22:15:05,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1572109581] [2022-03-15 22:15:05,622 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:05,623 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:05,626 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 51 transitions. [2022-03-15 22:15:05,626 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:06,472 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [28916#(and (or (< j1 M1) (<= (* C 4) counter)) (or (< j1 M1) (<= counter (* C 4))) (or (<= 4 M2) (< j1 M1)) (or (<= j2 0) (< j1 M1))), 28914#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ j2 4) M2)) (or (<= 4 M2) (< j1 M1) (not (<= counter 0)) (not (<= j2 1)) (<= (+ j2 4) M2)) (or (not (<= j2 0)) (< j1 M1) (<= (+ j2 4) M2))), 28912#(or (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 28917#(and (or (not (< j1 M1)) (<= 4 M2) (< (+ j1 1) M1)) (or (not (< j1 M1)) (<= counter (* 3 C)) (< (+ j1 1) M1)) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (* 3 C) counter)) (or (not (< j1 M1)) (<= j2 0) (< (+ j1 1) M1))), 28910#(< j1 M1), 28919#(and (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= counter C)) (or (< (+ 3 j1) M1) (<= C counter) (not (< (+ 2 j1) M1))) (or (<= j2 0) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (<= 4 M2) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)))), 28915#(and (or (<= j2 0) (< j1 M1) (<= 1 counter)) (or (<= 4 M2) (< j1 M1)) (or (<= counter 0) (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 1) 0)) (or (< j1 M1) (<= j2 1) (<= counter C))), 28911#(or (< j1 M1) (<= (+ j2 1) M2)), 28918#(and (or (< (+ 2 j1) M1) (<= 4 M2) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= j2 0) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= (* 2 C) counter))), 28913#(or (< j1 M1) (<= (+ 3 j2) M2) (<= counter C)), 28920#(and (or (not (< (+ 3 j1) M1)) (<= j2 0) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (<= counter 0) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (<= 0 counter) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (<= 4 M2) (< (+ j1 4) M1)))] [2022-03-15 22:15:06,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:15:06,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:15:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:15:06,473 INFO L87 Difference]: Start difference. First operand 223 states and 602 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 22:15:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:08,381 INFO L93 Difference]: Finished difference Result 341 states and 837 transitions. [2022-03-15 22:15:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:15:08,382 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 17 [2022-03-15 22:15:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:08,383 INFO L225 Difference]: With dead ends: 341 [2022-03-15 22:15:08,383 INFO L226 Difference]: Without dead ends: 341 [2022-03-15 22:15:08,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=694, Invalid=3862, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 22:15:08,383 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:08,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-03-15 22:15:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 228. [2022-03-15 22:15:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.709251101321586) internal successors, (615), 227 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 615 transitions. [2022-03-15 22:15:08,399 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 615 transitions. Word has length 17 [2022-03-15 22:15:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:08,399 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 615 transitions. [2022-03-15 22:15:08,399 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 22:15:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 615 transitions. [2022-03-15 22:15:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:08,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:08,400 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:08,416 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 22:15:08,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:08,611 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:08,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1204569624, now seen corresponding path program 50 times [2022-03-15 22:15:08,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:08,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529297799] [2022-03-15 22:15:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:08,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:08,701 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 22:15:08,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:08,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529297799] [2022-03-15 22:15:08,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529297799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:08,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201764382] [2022-03-15 22:15:08,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:15:08,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:08,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:08,703 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 22:15:08,704 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 22:15:08,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:15:08,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:15:08,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:08,954 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 22:15:08,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:09,167 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 22:15:09,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201764382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:09,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:09,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-03-15 22:15:09,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [438074252] [2022-03-15 22:15:09,168 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:09,169 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:09,171 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 49 transitions. [2022-03-15 22:15:09,171 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:09,512 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [29912#(or (<= M1 (+ 3 j1)) (<= (+ 5 j2) M2) (< (+ j1 4) M1)), 29903#(< j1 M1), 29906#(or (< j1 M1) (<= (+ 3 j2) M2)), 29911#(or (<= M1 (+ 2 j1)) (<= (+ 5 j2) M2) (< (+ 3 j1) M1)), 29908#(or (< j1 M1) (<= (+ 5 j2) M2)), 29909#(or (<= (+ 5 j2) M2) (< (+ j1 1) M1) (<= M1 j1)), 29905#(or (< j1 M1) (<= (+ 2 j2) M2)), 29904#(or (< j1 M1) (<= (+ j2 1) M2)), 29910#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ 5 j2) M2)), 29907#(or (< j1 M1) (<= (+ j2 4) M2)), 29913#(or (<= (+ 5 j2) M2) (< (+ 5 j1) M1) (<= M1 (+ j1 4)))] [2022-03-15 22:15:09,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:15:09,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:09,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:15:09,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1395, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:15:09,513 INFO L87 Difference]: Start difference. First operand 228 states and 615 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:09,912 INFO L93 Difference]: Finished difference Result 390 states and 895 transitions. [2022-03-15 22:15:09,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:15:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 22:15:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:09,913 INFO L225 Difference]: With dead ends: 390 [2022-03-15 22:15:09,913 INFO L226 Difference]: Without dead ends: 390 [2022-03-15 22:15:09,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=786, Invalid=2754, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:15:09,914 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:09,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-15 22:15:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 239. [2022-03-15 22:15:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.73109243697479) internal successors, (650), 238 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 650 transitions. [2022-03-15 22:15:09,918 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 650 transitions. Word has length 17 [2022-03-15 22:15:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:09,918 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 650 transitions. [2022-03-15 22:15:09,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 650 transitions. [2022-03-15 22:15:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:09,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:09,919 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:09,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 22:15:10,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 22:15:10,135 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:10,135 INFO L85 PathProgramCache]: Analyzing trace with hash -334402736, now seen corresponding path program 51 times [2022-03-15 22:15:10,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:10,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030318873] [2022-03-15 22:15:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:10,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:10,191 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 22:15:10,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:10,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030318873] [2022-03-15 22:15:10,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030318873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:10,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801118407] [2022-03-15 22:15:10,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:15:10,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:10,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:10,192 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 22:15:10,194 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 22:15:10,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:15:10,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:15:10,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:10,473 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 22:15:10,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:10,767 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 22:15:10,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801118407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:10,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:10,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2022-03-15 22:15:10,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1744599763] [2022-03-15 22:15:10,768 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:10,769 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:10,770 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 22:15:10,770 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:10,931 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [30941#(< j2 M2), 30942#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= (+ 3 j2) j1) (<= M1 j1))), 30943#(and (or (<= M1 (+ j1 1)) (<= (+ 2 j2) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 30945#(and (or (<= M1 (+ 3 j1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M1 (+ 3 j1)) (<= j2 j1))), 30944#(and (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M1 (+ 2 j1)) (<= (+ j2 1) j1)))] [2022-03-15 22:15:10,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:15:10,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:10,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:15:10,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:15:10,932 INFO L87 Difference]: Start difference. First operand 239 states and 650 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 22:15:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:11,138 INFO L93 Difference]: Finished difference Result 303 states and 753 transitions. [2022-03-15 22:15:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:15:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 22:15:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:11,139 INFO L225 Difference]: With dead ends: 303 [2022-03-15 22:15:11,139 INFO L226 Difference]: Without dead ends: 302 [2022-03-15 22:15:11,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=519, Invalid=1461, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:15:11,140 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:11,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:11,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-15 22:15:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 231. [2022-03-15 22:15:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.7130434782608694) internal successors, (624), 230 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 624 transitions. [2022-03-15 22:15:11,143 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 624 transitions. Word has length 17 [2022-03-15 22:15:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:11,143 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 624 transitions. [2022-03-15 22:15:11,143 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 22:15:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 624 transitions. [2022-03-15 22:15:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:11,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:11,144 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:11,162 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 22:15:11,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:11,345 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash 22104613, now seen corresponding path program 52 times [2022-03-15 22:15:11,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:11,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647787379] [2022-03-15 22:15:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:11,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:11,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:11,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647787379] [2022-03-15 22:15:11,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647787379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:11,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392205448] [2022-03-15 22:15:11,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:15:11,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:11,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:11,573 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 22:15:11,573 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 22:15:11,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:15:11,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:11,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:15:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:11,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:15:12,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392205448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:12,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:12,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2022-03-15 22:15:12,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [8241216] [2022-03-15 22:15:12,298 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:12,299 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:12,301 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 43 transitions. [2022-03-15 22:15:12,301 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:12,857 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [31862#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 31865#(and (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= j2 0) (not (<= (+ C counter) 0))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 2 j1)) (or (not (< j1 M1)) (<= j1 (+ 2 j2)))), 31866#(and (or (<= j1 (+ j2 1)) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (<= j2 0) (not (<= (+ (* 2 C) counter) 0)) (not (< (+ j1 1) M1))) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 31861#(or (< j1 M1) (<= (+ j2 1) M2)), 31860#(< j1 M1), 31863#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 31867#(and (or (<= j1 j2) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= j2 0) (not (<= (+ (* 3 C) counter) 0)) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 31864#(and (or (< j1 M1) (<= (* 2 C) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)))] [2022-03-15 22:15:12,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:15:12,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:12,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:15:12,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:15:12,857 INFO L87 Difference]: Start difference. First operand 231 states and 624 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 22:15:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:14,820 INFO L93 Difference]: Finished difference Result 345 states and 819 transitions. [2022-03-15 22:15:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 22:15:14,820 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 17 [2022-03-15 22:15:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:14,821 INFO L225 Difference]: With dead ends: 345 [2022-03-15 22:15:14,821 INFO L226 Difference]: Without dead ends: 345 [2022-03-15 22:15:14,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=375, Invalid=3165, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:15:14,822 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:14,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:15:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-15 22:15:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 235. [2022-03-15 22:15:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.717948717948718) internal successors, (636), 234 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 22:15:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 636 transitions. [2022-03-15 22:15:14,826 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 636 transitions. Word has length 17 [2022-03-15 22:15:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:14,826 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 636 transitions. [2022-03-15 22:15:14,826 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 22:15:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 636 transitions. [2022-03-15 22:15:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:14,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:14,826 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:14,849 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 22:15:15,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-15 22:15:15,027 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:15,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2119671705, now seen corresponding path program 53 times [2022-03-15 22:15:15,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:15,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655821223] [2022-03-15 22:15:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:15,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:15,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:15,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655821223] [2022-03-15 22:15:15,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655821223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:15,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904184961] [2022-03-15 22:15:15,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:15:15,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:15,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:15,224 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 22:15:15,225 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 22:15:15,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:15:15,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:15,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:15:15,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:15,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:15,947 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 22:15:15,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904184961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:15,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:15,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2022-03-15 22:15:15,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [979538855] [2022-03-15 22:15:15,948 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:15,949 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:15,950 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2022-03-15 22:15:15,951 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:16,399 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [32861#(< j1 M1), 32865#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 32862#(and (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 2 j2))) (or (not (< j1 M1)) (<= (+ 2 j2) j1) (not (<= (+ C counter) 0)))), 32867#(and (or (<= j1 j2) (not (< (+ 2 j1) M1))) (or (<= j2 j1) (not (<= (+ (* 3 C) counter) 0)) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 32864#(or (< j1 M1) (<= (+ j2 1) M2)), 32863#(and (or (<= j1 (+ j2 1)) (not (< (+ j1 1) M1))) (or (not (<= (+ (* 2 C) counter) 0)) (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 32866#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)))] [2022-03-15 22:15:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:15:16,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:15:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:15:16,400 INFO L87 Difference]: Start difference. First operand 235 states and 636 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 22:15:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:18,269 INFO L93 Difference]: Finished difference Result 347 states and 825 transitions. [2022-03-15 22:15:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 22:15:18,270 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 17 [2022-03-15 22:15:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:18,271 INFO L225 Difference]: With dead ends: 347 [2022-03-15 22:15:18,271 INFO L226 Difference]: Without dead ends: 347 [2022-03-15 22:15:18,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=529, Invalid=4163, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 22:15:18,271 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 121 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:18,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 0 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:18,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-15 22:15:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 238. [2022-03-15 22:15:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.721518987341772) internal successors, (645), 237 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 645 transitions. [2022-03-15 22:15:18,275 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 645 transitions. Word has length 17 [2022-03-15 22:15:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:18,275 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 645 transitions. [2022-03-15 22:15:18,275 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 22:15:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 645 transitions. [2022-03-15 22:15:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:18,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:18,275 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:18,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 22:15:18,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 22:15:18,486 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:18,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash -583611483, now seen corresponding path program 54 times [2022-03-15 22:15:18,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:18,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84772758] [2022-03-15 22:15:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:18,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:18,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84772758] [2022-03-15 22:15:18,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84772758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:18,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233844160] [2022-03-15 22:15:18,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:15:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:18,685 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 22:15:18,686 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 22:15:18,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:15:18,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:18,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:15:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:18,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:19,336 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 22:15:19,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233844160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:19,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:19,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2022-03-15 22:15:19,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1645354582] [2022-03-15 22:15:19,336 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:19,337 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:19,339 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 35 transitions. [2022-03-15 22:15:19,339 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:19,652 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [33879#(and (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 2 j2))) (or (not (< j1 M1)) (<= (+ 2 j2) j1) (not (<= (+ C counter) 0)))), 33880#(and (or (<= j1 (+ j2 1)) (not (< (+ j1 1) M1))) (or (not (<= (+ (* 2 C) counter) 0)) (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 33881#(and (or (<= j1 j2) (not (< (+ 2 j1) M1))) (or (<= j2 j1) (not (<= (+ (* 3 C) counter) 0)) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 33883#(or (< j1 M1) (<= (+ j2 1) M2)), 33882#(< j1 M1), 33884#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:15:19,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:15:19,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:15:19,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:15:19,653 INFO L87 Difference]: Start difference. First operand 238 states and 645 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 22:15:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:21,668 INFO L93 Difference]: Finished difference Result 387 states and 903 transitions. [2022-03-15 22:15:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 22:15:21,669 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 17 [2022-03-15 22:15:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:21,670 INFO L225 Difference]: With dead ends: 387 [2022-03-15 22:15:21,670 INFO L226 Difference]: Without dead ends: 387 [2022-03-15 22:15:21,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=550, Invalid=4280, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 22:15:21,670 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:21,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-15 22:15:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 240. [2022-03-15 22:15:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.723849372384937) internal successors, (651), 239 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 651 transitions. [2022-03-15 22:15:21,674 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 651 transitions. Word has length 17 [2022-03-15 22:15:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:21,674 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 651 transitions. [2022-03-15 22:15:21,674 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 22:15:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 651 transitions. [2022-03-15 22:15:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:21,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:21,675 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:21,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 22:15:21,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:21,875 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1225003495, now seen corresponding path program 55 times [2022-03-15 22:15:21,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:21,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206935597] [2022-03-15 22:15:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:21,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:22,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:22,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206935597] [2022-03-15 22:15:22,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206935597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:22,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927347293] [2022-03-15 22:15:22,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:15:22,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:22,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:22,092 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 22:15:22,092 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 22:15:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:15:22,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:22,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:23,111 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 22:15:23,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927347293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:23,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:23,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 28 [2022-03-15 22:15:23,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1159711007] [2022-03-15 22:15:23,111 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:23,112 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:23,114 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 22:15:23,114 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:23,318 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [34943#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 34946#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 34942#(or (< j1 M1) (= counter 0)), 34944#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 34945#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:15:23,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:15:23,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:15:23,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:15:23,319 INFO L87 Difference]: Start difference. First operand 240 states and 651 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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 22:15:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:25,521 INFO L93 Difference]: Finished difference Result 463 states and 1050 transitions. [2022-03-15 22:15:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 22:15:25,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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 22:15:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:25,523 INFO L225 Difference]: With dead ends: 463 [2022-03-15 22:15:25,523 INFO L226 Difference]: Without dead ends: 456 [2022-03-15 22:15:25,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=719, Invalid=4537, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 22:15:25,524 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:25,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-03-15 22:15:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 247. [2022-03-15 22:15:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.7439024390243905) internal successors, (675), 246 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 22:15:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 675 transitions. [2022-03-15 22:15:25,533 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 675 transitions. Word has length 17 [2022-03-15 22:15:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:25,533 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 675 transitions. [2022-03-15 22:15:25,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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 22:15:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 675 transitions. [2022-03-15 22:15:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:25,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:25,537 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:25,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 22:15:25,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:25,749 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash -359757535, now seen corresponding path program 56 times [2022-03-15 22:15:25,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:25,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116555648] [2022-03-15 22:15:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:25,986 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 22:15:25,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:25,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116555648] [2022-03-15 22:15:25,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116555648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:25,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227175356] [2022-03-15 22:15:25,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:15:25,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:25,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:25,998 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 22:15:25,999 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 22:15:26,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:15:26,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:26,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:15:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:26,198 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 22:15:26,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:26,387 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 22:15:26,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227175356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:26,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:26,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-03-15 22:15:26,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1320313522] [2022-03-15 22:15:26,387 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:26,388 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:26,390 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 22:15:26,390 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:26,585 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [36104#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 36103#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1)))), 36032#(< j2 M2), 36102#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (= M2 M1)))] [2022-03-15 22:15:26,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:15:26,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:15:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-03-15 22:15:26,586 INFO L87 Difference]: Start difference. First operand 247 states and 675 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 22:15:27,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:27,024 INFO L93 Difference]: Finished difference Result 386 states and 989 transitions. [2022-03-15 22:15:27,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:15:27,025 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 17 [2022-03-15 22:15:27,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:27,026 INFO L225 Difference]: With dead ends: 386 [2022-03-15 22:15:27,026 INFO L226 Difference]: Without dead ends: 385 [2022-03-15 22:15:27,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:15:27,026 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:27,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-03-15 22:15:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 248. [2022-03-15 22:15:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.7408906882591095) internal successors, (677), 247 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 677 transitions. [2022-03-15 22:15:27,030 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 677 transitions. Word has length 17 [2022-03-15 22:15:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:27,030 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 677 transitions. [2022-03-15 22:15:27,030 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 22:15:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 677 transitions. [2022-03-15 22:15:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:27,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:27,031 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:27,047 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 22:15:27,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:27,239 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:27,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:27,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1363964568, now seen corresponding path program 57 times [2022-03-15 22:15:27,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:27,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081601133] [2022-03-15 22:15:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:27,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:27,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:27,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081601133] [2022-03-15 22:15:27,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081601133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:27,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780416861] [2022-03-15 22:15:27,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:15:27,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:27,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:27,431 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 22:15:27,432 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 22:15:27,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:15:27,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:27,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:15:27,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:27,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:15:28,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780416861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:28,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:28,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 25 [2022-03-15 22:15:28,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1220867492] [2022-03-15 22:15:28,100 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:28,100 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:28,103 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 45 transitions. [2022-03-15 22:15:28,103 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:28,656 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [37148#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 37143#(or (< j1 M1) (<= (+ 2 j2) M2)), 37147#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 37144#(or (< j1 M1) (<= (+ 3 j2) M2)), 37142#(or (< j1 M1) (<= (+ j2 1) M2)), 37141#(< j1 M1), 37145#(and (or (<= M2 j2) (<= counter 0) (< j1 M1)) (or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2))), 37146#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)))] [2022-03-15 22:15:28,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:15:28,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:28,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:15:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:15:28,656 INFO L87 Difference]: Start difference. First operand 248 states and 677 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:29,551 INFO L93 Difference]: Finished difference Result 342 states and 861 transitions. [2022-03-15 22:15:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:15:29,551 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 22:15:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:29,553 INFO L225 Difference]: With dead ends: 342 [2022-03-15 22:15:29,553 INFO L226 Difference]: Without dead ends: 330 [2022-03-15 22:15:29,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=335, Invalid=2215, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:15:29,553 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:29,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:15:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-15 22:15:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 248. [2022-03-15 22:15:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.716599190283401) internal successors, (671), 247 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 671 transitions. [2022-03-15 22:15:29,557 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 671 transitions. Word has length 17 [2022-03-15 22:15:29,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:29,557 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 671 transitions. [2022-03-15 22:15:29,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 671 transitions. [2022-03-15 22:15:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:29,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:29,557 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:29,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 22:15:29,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 22:15:29,758 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:29,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:29,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1033057203, now seen corresponding path program 58 times [2022-03-15 22:15:29,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:29,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837018595] [2022-03-15 22:15:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:29,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:29,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:29,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837018595] [2022-03-15 22:15:29,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837018595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:29,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078439590] [2022-03-15 22:15:29,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:15:29,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:29,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:29,980 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 22:15:29,981 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 22:15:30,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:15:30,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:15:30,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:30,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:30,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078439590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:30,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:30,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2022-03-15 22:15:30,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1954188393] [2022-03-15 22:15:30,494 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:30,495 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:30,497 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 41 transitions. [2022-03-15 22:15:30,497 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:31,051 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [38150#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 38151#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 38149#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2)))), 38145#(< j1 M1), 38146#(or (< j1 M1) (<= (+ 2 j2) M2)), 38147#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 38148#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2)))] [2022-03-15 22:15:31,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:15:31,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:31,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:15:31,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:15:31,052 INFO L87 Difference]: Start difference. First operand 248 states and 671 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 22:15:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:31,790 INFO L93 Difference]: Finished difference Result 304 states and 779 transitions. [2022-03-15 22:15:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:15:31,790 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 17 [2022-03-15 22:15:31,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:31,791 INFO L225 Difference]: With dead ends: 304 [2022-03-15 22:15:31,791 INFO L226 Difference]: Without dead ends: 304 [2022-03-15 22:15:31,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=1922, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:15:31,791 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:31,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:15:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-03-15 22:15:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 248. [2022-03-15 22:15:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.716599190283401) internal successors, (671), 247 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 671 transitions. [2022-03-15 22:15:31,804 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 671 transitions. Word has length 17 [2022-03-15 22:15:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:31,804 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 671 transitions. [2022-03-15 22:15:31,804 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 22:15:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 671 transitions. [2022-03-15 22:15:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:31,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:31,804 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:31,820 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 22:15:32,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 22:15:32,012 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:32,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1164343001, now seen corresponding path program 59 times [2022-03-15 22:15:32,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:32,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988680754] [2022-03-15 22:15:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:32,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:32,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:32,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988680754] [2022-03-15 22:15:32,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988680754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:32,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127670845] [2022-03-15 22:15:32,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:15:32,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:32,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:32,219 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 22:15:32,220 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 22:15:32,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:15:32,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:32,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:15:32,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:32,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 22:15:32,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127670845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:32,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:32,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 7] total 28 [2022-03-15 22:15:32,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [650843238] [2022-03-15 22:15:32,871 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:32,872 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:32,874 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 37 transitions. [2022-03-15 22:15:32,874 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:33,195 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [39104#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 39101#(< j1 M1), 39103#(or (< j1 M1) (<= (+ j2 1) M2)), 39106#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 39105#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 39102#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:15:33,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:15:33,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:15:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:15:33,195 INFO L87 Difference]: Start difference. First operand 248 states and 671 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 22:15:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:34,180 INFO L93 Difference]: Finished difference Result 344 states and 868 transitions. [2022-03-15 22:15:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 22:15:34,180 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 17 [2022-03-15 22:15:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:34,182 INFO L225 Difference]: With dead ends: 344 [2022-03-15 22:15:34,182 INFO L226 Difference]: Without dead ends: 343 [2022-03-15 22:15:34,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=414, Invalid=3008, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 22:15:34,182 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:34,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-03-15 22:15:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 254. [2022-03-15 22:15:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.7233201581027666) internal successors, (689), 253 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 689 transitions. [2022-03-15 22:15:34,187 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 689 transitions. Word has length 17 [2022-03-15 22:15:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:34,187 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 689 transitions. [2022-03-15 22:15:34,187 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 22:15:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 689 transitions. [2022-03-15 22:15:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:34,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:34,187 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:34,219 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 22:15:34,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:34,388 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:34,388 INFO L85 PathProgramCache]: Analyzing trace with hash 427341107, now seen corresponding path program 60 times [2022-03-15 22:15:34,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:34,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451551249] [2022-03-15 22:15:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:34,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:34,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:34,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451551249] [2022-03-15 22:15:34,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451551249] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:34,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299253385] [2022-03-15 22:15:34,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:15:34,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:34,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:34,596 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 22:15:34,597 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 22:15:34,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:15:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:34,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:15:34,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:34,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:15:35,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299253385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:35,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:35,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 29 [2022-03-15 22:15:35,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [913658521] [2022-03-15 22:15:35,274 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:35,275 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:35,277 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2022-03-15 22:15:35,277 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:35,544 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [40136#(or (< j1 M1) (<= (+ j2 1) M2)), 40135#(< j1 M1), 40137#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 40134#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 40133#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:15:35,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:15:35,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:15:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:15:35,545 INFO L87 Difference]: Start difference. First operand 254 states and 689 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 22:15:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:36,817 INFO L93 Difference]: Finished difference Result 384 states and 965 transitions. [2022-03-15 22:15:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:15:36,817 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 17 [2022-03-15 22:15:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:36,818 INFO L225 Difference]: With dead ends: 384 [2022-03-15 22:15:36,818 INFO L226 Difference]: Without dead ends: 384 [2022-03-15 22:15:36,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 22:15:36,819 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:36,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-03-15 22:15:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 258. [2022-03-15 22:15:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.727626459143969) internal successors, (701), 257 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 701 transitions. [2022-03-15 22:15:36,823 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 701 transitions. Word has length 17 [2022-03-15 22:15:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:36,823 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 701 transitions. [2022-03-15 22:15:36,823 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 22:15:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 701 transitions. [2022-03-15 22:15:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:36,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:36,832 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:36,848 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 22:15:37,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:37,032 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:37,033 INFO L85 PathProgramCache]: Analyzing trace with hash -214050905, now seen corresponding path program 61 times [2022-03-15 22:15:37,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:37,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795957747] [2022-03-15 22:15:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:37,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:37,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:37,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795957747] [2022-03-15 22:15:37,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795957747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:37,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177924982] [2022-03-15 22:15:37,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:15:37,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:37,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:37,266 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 22:15:37,267 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 22:15:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:15:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:37,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:38,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177924982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:38,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:38,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 28 [2022-03-15 22:15:38,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1325118607] [2022-03-15 22:15:38,229 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:38,229 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:38,231 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 22:15:38,231 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:38,425 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [41221#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 41219#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 41220#(or (< j2 M2) (< j1 M1) (= counter 0)), 41218#(or (< j1 M1) (= counter 0))] [2022-03-15 22:15:38,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:15:38,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:15:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:15:38,426 INFO L87 Difference]: Start difference. First operand 258 states and 701 transitions. Second operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:15:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:39,771 INFO L93 Difference]: Finished difference Result 415 states and 1014 transitions. [2022-03-15 22:15:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 22:15:39,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:15:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:39,773 INFO L225 Difference]: With dead ends: 415 [2022-03-15 22:15:39,773 INFO L226 Difference]: Without dead ends: 408 [2022-03-15 22:15:39,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=505, Invalid=2917, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 22:15:39,774 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:39,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-03-15 22:15:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 259. [2022-03-15 22:15:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.7248062015503876) internal successors, (703), 258 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 703 transitions. [2022-03-15 22:15:39,778 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 703 transitions. Word has length 17 [2022-03-15 22:15:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:39,778 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 703 transitions. [2022-03-15 22:15:39,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:15:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 703 transitions. [2022-03-15 22:15:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:39,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:39,778 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:39,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 22:15:39,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:39,995 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:39,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:39,995 INFO L85 PathProgramCache]: Analyzing trace with hash 651195055, now seen corresponding path program 62 times [2022-03-15 22:15:39,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:39,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085680214] [2022-03-15 22:15:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:39,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:40,155 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 22:15:40,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:40,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085680214] [2022-03-15 22:15:40,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085680214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:40,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124138529] [2022-03-15 22:15:40,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:15:40,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:40,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:40,172 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 22:15:40,188 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 22:15:40,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:15:40,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:15:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:40,474 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 22:15:40,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:15:40,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124138529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:40,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:40,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 24 [2022-03-15 22:15:40,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1645643703] [2022-03-15 22:15:40,643 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:40,644 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:40,646 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2022-03-15 22:15:40,646 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:40,766 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [42258#(< j2 M2), 42326#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 42327#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:15:40,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:15:40,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:15:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:15:40,766 INFO L87 Difference]: Start difference. First operand 259 states and 703 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 22:15:41,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:41,169 INFO L93 Difference]: Finished difference Result 410 states and 1064 transitions. [2022-03-15 22:15:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:15:41,169 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 22:15:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:41,170 INFO L225 Difference]: With dead ends: 410 [2022-03-15 22:15:41,170 INFO L226 Difference]: Without dead ends: 409 [2022-03-15 22:15:41,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:15:41,171 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:41,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-03-15 22:15:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 258. [2022-03-15 22:15:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.727626459143969) internal successors, (701), 257 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 701 transitions. [2022-03-15 22:15:41,175 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 701 transitions. Word has length 17 [2022-03-15 22:15:41,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:41,175 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 701 transitions. [2022-03-15 22:15:41,175 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 22:15:41,175 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 701 transitions. [2022-03-15 22:15:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:41,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:41,175 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:41,193 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 22:15:41,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:41,378 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash -763894156, now seen corresponding path program 63 times [2022-03-15 22:15:41,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:41,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754710040] [2022-03-15 22:15:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:41,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:41,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:41,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754710040] [2022-03-15 22:15:41,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754710040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:41,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568634780] [2022-03-15 22:15:41,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:15:41,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:41,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:41,515 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 22:15:41,516 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 22:15:41,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:15:41,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:41,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:15:41,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:15:41,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:42,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568634780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:42,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:42,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 29 [2022-03-15 22:15:42,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [464631992] [2022-03-15 22:15:42,031 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:42,032 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:42,034 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 41 transitions. [2022-03-15 22:15:42,034 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:42,382 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [43410#(and (or (<= M2 j2) (<= counter 0) (< j1 M1)) (or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2))), 43407#(or (< j1 M1) (<= (+ j2 1) M2)), 43409#(or (< j1 M1) (<= (+ 3 j2) M2)), 43412#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 43408#(or (< j1 M1) (<= (+ 2 j2) M2)), 43411#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 43406#(< j1 M1)] [2022-03-15 22:15:42,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:15:42,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:42,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:15:42,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:15:42,383 INFO L87 Difference]: Start difference. First operand 258 states and 701 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 22:15:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:43,155 INFO L93 Difference]: Finished difference Result 351 states and 885 transitions. [2022-03-15 22:15:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:15:43,155 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 17 [2022-03-15 22:15:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:43,157 INFO L225 Difference]: With dead ends: 351 [2022-03-15 22:15:43,157 INFO L226 Difference]: Without dead ends: 341 [2022-03-15 22:15:43,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 22:15:43,157 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:43,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-03-15 22:15:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 258. [2022-03-15 22:15:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.708171206225681) internal successors, (696), 257 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 22:15:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 696 transitions. [2022-03-15 22:15:43,163 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 696 transitions. Word has length 17 [2022-03-15 22:15:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:43,164 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 696 transitions. [2022-03-15 22:15:43,164 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 22:15:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 696 transitions. [2022-03-15 22:15:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:43,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:43,164 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:43,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 22:15:43,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 22:15:43,365 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:43,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1530186441, now seen corresponding path program 64 times [2022-03-15 22:15:43,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:43,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862036040] [2022-03-15 22:15:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:43,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:43,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:43,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862036040] [2022-03-15 22:15:43,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862036040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:43,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034247492] [2022-03-15 22:15:43,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:15:43,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:43,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:43,571 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 22:15:43,572 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 22:15:43,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:15:43,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:43,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:15:43,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:43,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:15:44,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034247492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:44,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:44,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 7] total 25 [2022-03-15 22:15:44,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2140754022] [2022-03-15 22:15:44,005 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:44,005 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:44,007 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 37 transitions. [2022-03-15 22:15:44,007 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:44,274 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [44434#(or (< j1 M1) (<= (+ j2 1) M2)), 44437#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 44432#(< j1 M1), 44433#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 44435#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 44436#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:15:44,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:15:44,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:44,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:15:44,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:15:44,286 INFO L87 Difference]: Start difference. First operand 258 states and 696 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 22:15:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:45,838 INFO L93 Difference]: Finished difference Result 462 states and 1124 transitions. [2022-03-15 22:15:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 22:15:45,839 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 17 [2022-03-15 22:15:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:45,840 INFO L225 Difference]: With dead ends: 462 [2022-03-15 22:15:45,840 INFO L226 Difference]: Without dead ends: 461 [2022-03-15 22:15:45,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=629, Invalid=4483, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 22:15:45,846 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 139 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:45,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 0 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-03-15 22:15:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 262. [2022-03-15 22:15:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7126436781609193) internal successors, (708), 261 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 708 transitions. [2022-03-15 22:15:45,850 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 708 transitions. Word has length 17 [2022-03-15 22:15:45,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:45,851 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 708 transitions. [2022-03-15 22:15:45,851 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 22:15:45,851 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 708 transitions. [2022-03-15 22:15:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:45,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:45,851 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:45,867 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 22:15:46,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:46,067 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:46,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1814488759, now seen corresponding path program 65 times [2022-03-15 22:15:46,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:46,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142724852] [2022-03-15 22:15:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:46,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:46,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:46,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142724852] [2022-03-15 22:15:46,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142724852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:46,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719425043] [2022-03-15 22:15:46,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:15:46,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:46,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:46,260 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 22:15:46,261 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 22:15:46,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:15:46,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:46,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:15:46,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:46,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:47,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719425043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:47,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:47,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 28 [2022-03-15 22:15:47,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [781057474] [2022-03-15 22:15:47,043 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:47,044 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:47,045 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 22:15:47,045 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:47,172 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [45630#(or (< j1 M1) (= counter 0)), 45633#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 45632#(or (< j2 M2) (< j1 M1) (= counter 0)), 45631#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:15:47,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:15:47,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:47,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:15:47,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:15:47,173 INFO L87 Difference]: Start difference. First operand 262 states and 708 transitions. Second operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:15:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:48,072 INFO L93 Difference]: Finished difference Result 388 states and 941 transitions. [2022-03-15 22:15:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:15:48,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:15:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:48,074 INFO L225 Difference]: With dead ends: 388 [2022-03-15 22:15:48,074 INFO L226 Difference]: Without dead ends: 381 [2022-03-15 22:15:48,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=443, Invalid=2637, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 22:15:48,074 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:48,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-15 22:15:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 264. [2022-03-15 22:15:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.714828897338403) internal successors, (714), 263 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 22:15:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 714 transitions. [2022-03-15 22:15:48,078 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 714 transitions. Word has length 17 [2022-03-15 22:15:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:48,078 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 714 transitions. [2022-03-15 22:15:48,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:15:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 714 transitions. [2022-03-15 22:15:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:48,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:48,079 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:48,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-15 22:15:48,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 22:15:48,295 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:48,295 INFO L85 PathProgramCache]: Analyzing trace with hash -949242799, now seen corresponding path program 66 times [2022-03-15 22:15:48,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:48,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968490186] [2022-03-15 22:15:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:48,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:48,481 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 22:15:48,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:48,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968490186] [2022-03-15 22:15:48,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968490186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:48,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153903558] [2022-03-15 22:15:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:15:48,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:48,483 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 22:15:48,523 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 22:15:48,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:15:48,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:48,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:15:48,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:48,702 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 22:15:48,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:15:48,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153903558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:48,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:48,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2022-03-15 22:15:48,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1180730259] [2022-03-15 22:15:48,859 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:48,860 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:48,862 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2022-03-15 22:15:48,862 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:48,934 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [46715#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 46716#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 46646#(< j2 M2)] [2022-03-15 22:15:48,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:15:48,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:48,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:15:48,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:15:48,935 INFO L87 Difference]: Start difference. First operand 264 states and 714 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 22:15:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:49,294 INFO L93 Difference]: Finished difference Result 392 states and 1000 transitions. [2022-03-15 22:15:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:15:49,294 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 22:15:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:49,295 INFO L225 Difference]: With dead ends: 392 [2022-03-15 22:15:49,295 INFO L226 Difference]: Without dead ends: 391 [2022-03-15 22:15:49,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:15:49,296 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:49,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-03-15 22:15:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 266. [2022-03-15 22:15:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.7169811320754715) internal successors, (720), 265 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 720 transitions. [2022-03-15 22:15:49,300 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 720 transitions. Word has length 17 [2022-03-15 22:15:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:49,300 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 720 transitions. [2022-03-15 22:15:49,300 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 22:15:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 720 transitions. [2022-03-15 22:15:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:49,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:49,300 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:49,333 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 22:15:49,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 22:15:49,517 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1333672936, now seen corresponding path program 67 times [2022-03-15 22:15:49,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:49,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462534909] [2022-03-15 22:15:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:49,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:49,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:49,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462534909] [2022-03-15 22:15:49,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462534909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:49,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162780817] [2022-03-15 22:15:49,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:15:49,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:49,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:49,758 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 22:15:49,759 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 22:15:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:49,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:15:49,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:50,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:50,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162780817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:50,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:50,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 29 [2022-03-15 22:15:50,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1121210809] [2022-03-15 22:15:50,465 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:50,466 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:50,468 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 37 transitions. [2022-03-15 22:15:50,468 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:50,695 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [47805#(or (< j1 M1) (<= (+ 2 j2) M2)), 47804#(or (< j1 M1) (<= (+ j2 1) M2)), 47807#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 47806#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 47808#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 47803#(< j1 M1)] [2022-03-15 22:15:50,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:15:50,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:15:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:15:50,696 INFO L87 Difference]: Start difference. First operand 266 states and 720 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 22:15:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:51,207 INFO L93 Difference]: Finished difference Result 359 states and 911 transitions. [2022-03-15 22:15:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:15:51,208 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 17 [2022-03-15 22:15:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:51,209 INFO L225 Difference]: With dead ends: 359 [2022-03-15 22:15:51,209 INFO L226 Difference]: Without dead ends: 359 [2022-03-15 22:15:51,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=383, Invalid=2269, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 22:15:51,209 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:51,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-15 22:15:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 267. [2022-03-15 22:15:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7218045112781954) internal successors, (724), 266 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 724 transitions. [2022-03-15 22:15:51,213 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 724 transitions. Word has length 17 [2022-03-15 22:15:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:51,213 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 724 transitions. [2022-03-15 22:15:51,213 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 22:15:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 724 transitions. [2022-03-15 22:15:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:51,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:51,214 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:51,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 22:15:51,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 22:15:51,430 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:51,430 INFO L85 PathProgramCache]: Analyzing trace with hash 437844211, now seen corresponding path program 68 times [2022-03-15 22:15:51,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:51,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486120317] [2022-03-15 22:15:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:51,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:51,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:51,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486120317] [2022-03-15 22:15:51,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486120317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:51,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78924957] [2022-03-15 22:15:51,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:15:51,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:51,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:51,656 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 22:15:51,658 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 22:15:51,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:15:51,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:51,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:15:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:52,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:52,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78924957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:52,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:52,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 28 [2022-03-15 22:15:52,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [87395369] [2022-03-15 22:15:52,550 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:52,550 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:52,552 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2022-03-15 22:15:52,552 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:52,862 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [48861#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 48863#(or (< j2 M2) (< j1 M1) (= counter 0)), 48860#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 48864#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 48862#(or (< j1 M1) (= counter 0))] [2022-03-15 22:15:52,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:15:52,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:15:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:15:52,863 INFO L87 Difference]: Start difference. First operand 267 states and 724 transitions. Second operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 22:15:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:54,614 INFO L93 Difference]: Finished difference Result 472 states and 1120 transitions. [2022-03-15 22:15:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 22:15:54,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 22:15:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:54,616 INFO L225 Difference]: With dead ends: 472 [2022-03-15 22:15:54,616 INFO L226 Difference]: Without dead ends: 458 [2022-03-15 22:15:54,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=565, Invalid=3595, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:15:54,616 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:54,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:15:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-03-15 22:15:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 272. [2022-03-15 22:15:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.726937269372694) internal successors, (739), 271 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 739 transitions. [2022-03-15 22:15:54,620 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 739 transitions. Word has length 17 [2022-03-15 22:15:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:54,620 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 739 transitions. [2022-03-15 22:15:54,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 22:15:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 739 transitions. [2022-03-15 22:15:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:54,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:54,621 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:54,653 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 22:15:54,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 22:15:54,822 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:54,822 INFO L85 PathProgramCache]: Analyzing trace with hash 661698159, now seen corresponding path program 69 times [2022-03-15 22:15:54,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:54,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594457683] [2022-03-15 22:15:54,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:54,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:54,989 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 22:15:54,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:54,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594457683] [2022-03-15 22:15:54,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594457683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:54,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880646127] [2022-03-15 22:15:54,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:15:54,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:54,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:54,990 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 22:15:54,991 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 22:15:55,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:15:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:15:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:55,197 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 22:15:55,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:15:55,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880646127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:55,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:55,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-03-15 22:15:55,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [796563048] [2022-03-15 22:15:55,368 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:55,369 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:55,371 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2022-03-15 22:15:55,371 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:55,480 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [50062#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 49992#(< j2 M2), 50061#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:15:55,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:15:55,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:15:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:15:55,481 INFO L87 Difference]: Start difference. First operand 272 states and 739 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 22:15:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:55,773 INFO L93 Difference]: Finished difference Result 408 states and 1034 transitions. [2022-03-15 22:15:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:15:55,773 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 22:15:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:55,774 INFO L225 Difference]: With dead ends: 408 [2022-03-15 22:15:55,775 INFO L226 Difference]: Without dead ends: 407 [2022-03-15 22:15:55,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:15:55,775 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:55,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:55,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-15 22:15:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 273. [2022-03-15 22:15:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.7279411764705883) internal successors, (742), 272 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 742 transitions. [2022-03-15 22:15:55,779 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 742 transitions. Word has length 17 [2022-03-15 22:15:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:55,779 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 742 transitions. [2022-03-15 22:15:55,779 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 22:15:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 742 transitions. [2022-03-15 22:15:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:55,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:55,780 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:55,795 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 22:15:55,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:55,987 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:55,988 INFO L85 PathProgramCache]: Analyzing trace with hash 541154697, now seen corresponding path program 70 times [2022-03-15 22:15:55,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:55,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975501774] [2022-03-15 22:15:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:55,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:56,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:56,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975501774] [2022-03-15 22:15:56,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975501774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:56,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095947826] [2022-03-15 22:15:56,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:15:56,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:56,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:56,144 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 22:15:56,145 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 22:15:56,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:15:56,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 22:15:56,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:56,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:57,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095947826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:57,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:57,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 11] total 29 [2022-03-15 22:15:57,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1460760442] [2022-03-15 22:15:57,442 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:57,443 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:57,445 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 22:15:57,445 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:57,563 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [51165#(< j1 M1), 51166#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 51168#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 51167#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:15:57,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:15:57,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:57,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:15:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:15:57,563 INFO L87 Difference]: Start difference. First operand 273 states and 742 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 22:15:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:15:57,920 INFO L93 Difference]: Finished difference Result 399 states and 990 transitions. [2022-03-15 22:15:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:15:57,920 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 22:15:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:15:57,927 INFO L225 Difference]: With dead ends: 399 [2022-03-15 22:15:57,928 INFO L226 Difference]: Without dead ends: 399 [2022-03-15 22:15:57,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=424, Invalid=1646, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:15:57,928 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:15:57,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:15:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-03-15 22:15:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 270. [2022-03-15 22:15:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.721189591078067) internal successors, (732), 269 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:15:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 732 transitions. [2022-03-15 22:15:57,932 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 732 transitions. Word has length 17 [2022-03-15 22:15:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:15:57,932 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 732 transitions. [2022-03-15 22:15:57,932 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 22:15:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 732 transitions. [2022-03-15 22:15:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:15:57,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:15:57,933 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:15:57,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 22:15:58,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:58,148 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:15:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:15:58,149 INFO L85 PathProgramCache]: Analyzing trace with hash -89205350, now seen corresponding path program 71 times [2022-03-15 22:15:58,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:15:58,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5222893] [2022-03-15 22:15:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:15:58,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:15:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:15:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:58,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:15:58,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5222893] [2022-03-15 22:15:58,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5222893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:15:58,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691373629] [2022-03-15 22:15:58,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:15:58,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:15:58,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:15:58,287 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 22:15:58,287 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 22:15:58,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:15:58,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:15:58,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:15:58,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:15:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:15:58,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:15:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:15:58,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691373629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:15:58,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:15:58,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 26 [2022-03-15 22:15:58,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2008679163] [2022-03-15 22:15:58,973 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:15:58,974 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:15:58,976 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 43 transitions. [2022-03-15 22:15:58,976 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:15:59,463 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [52261#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 52257#(or (< j1 M1) (<= (+ 2 j2) M2)), 52255#(< j1 M1), 52260#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2))), 52256#(or (< j1 M1) (<= (+ j2 1) M2)), 52258#(or (< j1 M1) (<= (+ 3 j2) M2)), 52259#(and (or (<= M2 j2) (<= counter 0) (< j1 M1)) (or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)))] [2022-03-15 22:15:59,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:15:59,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:15:59,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:15:59,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:15:59,464 INFO L87 Difference]: Start difference. First operand 270 states and 732 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:00,085 INFO L93 Difference]: Finished difference Result 311 states and 810 transitions. [2022-03-15 22:16:00,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:16:00,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 22:16:00,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:00,087 INFO L225 Difference]: With dead ends: 311 [2022-03-15 22:16:00,087 INFO L226 Difference]: Without dead ends: 299 [2022-03-15 22:16:00,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:16:00,087 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:00,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:16:00,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-15 22:16:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2022-03-15 22:16:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.697416974169742) internal successors, (731), 271 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 731 transitions. [2022-03-15 22:16:00,091 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 731 transitions. Word has length 17 [2022-03-15 22:16:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:00,091 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 731 transitions. [2022-03-15 22:16:00,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 731 transitions. [2022-03-15 22:16:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:00,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:00,091 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:00,107 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 22:16:00,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:00,292 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:00,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1987150875, now seen corresponding path program 72 times [2022-03-15 22:16:00,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:00,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136566770] [2022-03-15 22:16:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:00,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:00,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136566770] [2022-03-15 22:16:00,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136566770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:00,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103374382] [2022-03-15 22:16:00,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:16:00,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:00,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:00,543 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 22:16:00,544 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 22:16:00,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:16:00,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:00,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:16:00,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:00,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:01,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103374382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:01,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:01,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 28 [2022-03-15 22:16:01,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [210524034] [2022-03-15 22:16:01,225 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:01,226 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:01,228 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2022-03-15 22:16:01,228 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:01,546 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [53262#(< j1 M1), 53263#(or (< j1 M1) (<= (+ 2 j2) M2)), 53266#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2)))), 53264#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 53265#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 53267#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:16:01,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:16:01,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:16:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:16:01,547 INFO L87 Difference]: Start difference. First operand 272 states and 731 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 22:16:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:01,952 INFO L93 Difference]: Finished difference Result 298 states and 787 transitions. [2022-03-15 22:16:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:16:01,952 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 17 [2022-03-15 22:16:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:01,956 INFO L225 Difference]: With dead ends: 298 [2022-03-15 22:16:01,956 INFO L226 Difference]: Without dead ends: 298 [2022-03-15 22:16:01,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:16:01,956 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:01,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:16:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-15 22:16:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 275. [2022-03-15 22:16:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.7007299270072993) internal successors, (740), 274 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 740 transitions. [2022-03-15 22:16:01,960 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 740 transitions. Word has length 17 [2022-03-15 22:16:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:01,960 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 740 transitions. [2022-03-15 22:16:01,960 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 22:16:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 740 transitions. [2022-03-15 22:16:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:01,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:01,960 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:01,976 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 22:16:02,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-15 22:16:02,175 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:02,175 INFO L85 PathProgramCache]: Analyzing trace with hash 110416217, now seen corresponding path program 73 times [2022-03-15 22:16:02,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:02,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442990679] [2022-03-15 22:16:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:02,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:02,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:02,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442990679] [2022-03-15 22:16:02,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442990679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:02,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131216549] [2022-03-15 22:16:02,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:16:02,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:02,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:02,390 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 22:16:02,418 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 22:16:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:02,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:16:02,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:02,668 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 22:16:02,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:16:02,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131216549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:02,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:02,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 24 [2022-03-15 22:16:02,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [440785936] [2022-03-15 22:16:02,802 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:02,803 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:02,805 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 35 transitions. [2022-03-15 22:16:02,805 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:03,051 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [54253#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 54252#(or (< j1 M1) (<= (+ j2 1) M2)), 54254#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 54255#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 54251#(< j1 M1)] [2022-03-15 22:16:03,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:16:03,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:03,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:16:03,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:16:03,052 INFO L87 Difference]: Start difference. First operand 275 states and 740 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 22:16:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:03,531 INFO L93 Difference]: Finished difference Result 310 states and 816 transitions. [2022-03-15 22:16:03,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:16:03,531 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 17 [2022-03-15 22:16:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:03,532 INFO L225 Difference]: With dead ends: 310 [2022-03-15 22:16:03,532 INFO L226 Difference]: Without dead ends: 309 [2022-03-15 22:16:03,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:16:03,532 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:03,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:16:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-15 22:16:03,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 280. [2022-03-15 22:16:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.706093189964158) internal successors, (755), 279 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 755 transitions. [2022-03-15 22:16:03,536 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 755 transitions. Word has length 17 [2022-03-15 22:16:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:03,536 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 755 transitions. [2022-03-15 22:16:03,536 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 22:16:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 755 transitions. [2022-03-15 22:16:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:03,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:03,537 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:03,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 22:16:03,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:03,737 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:03,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1702100325, now seen corresponding path program 74 times [2022-03-15 22:16:03,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:03,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86730990] [2022-03-15 22:16:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:03,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:03,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:03,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86730990] [2022-03-15 22:16:03,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86730990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:03,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142221610] [2022-03-15 22:16:03,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:16:03,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:03,984 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 22:16:04,011 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 22:16:04,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:16:04,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:04,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:16:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:04,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:16:04,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142221610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:04,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:04,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2022-03-15 22:16:04,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2134510730] [2022-03-15 22:16:04,519 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:04,520 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:04,521 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 22:16:04,521 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:04,679 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [55268#(< j1 M1), 55270#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 55267#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 55269#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:16:04,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:16:04,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:04,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:16:04,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:16:04,679 INFO L87 Difference]: Start difference. First operand 280 states and 755 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:16:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:05,589 INFO L93 Difference]: Finished difference Result 343 states and 888 transitions. [2022-03-15 22:16:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 22:16:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:16:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:05,590 INFO L225 Difference]: With dead ends: 343 [2022-03-15 22:16:05,590 INFO L226 Difference]: Without dead ends: 342 [2022-03-15 22:16:05,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=286, Invalid=2066, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:16:05,590 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:05,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:16:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-15 22:16:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 284. [2022-03-15 22:16:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7102473498233217) internal successors, (767), 283 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 767 transitions. [2022-03-15 22:16:05,594 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 767 transitions. Word has length 17 [2022-03-15 22:16:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:05,594 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 767 transitions. [2022-03-15 22:16:05,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:16:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 767 transitions. [2022-03-15 22:16:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:05,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:05,595 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:05,611 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 22:16:05,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:05,811 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1060708313, now seen corresponding path program 75 times [2022-03-15 22:16:05,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:05,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837971745] [2022-03-15 22:16:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:05,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:06,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:06,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837971745] [2022-03-15 22:16:06,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837971745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:06,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127029722] [2022-03-15 22:16:06,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:16:06,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:06,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:06,020 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 22:16:06,062 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 22:16:06,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:16:06,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:16:06,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:06,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:06,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127029722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:06,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:06,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 28 [2022-03-15 22:16:06,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [199828648] [2022-03-15 22:16:06,877 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:06,878 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:06,880 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2022-03-15 22:16:06,880 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:06,985 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [56344#(or (< j1 M1) (= counter 0)), 56346#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1)))), 56345#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:16:06,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:16:06,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:06,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:16:06,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:16:06,985 INFO L87 Difference]: Start difference. First operand 284 states and 767 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 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 22:16:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:07,315 INFO L93 Difference]: Finished difference Result 310 states and 817 transitions. [2022-03-15 22:16:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:16:07,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 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 22:16:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:07,316 INFO L225 Difference]: With dead ends: 310 [2022-03-15 22:16:07,316 INFO L226 Difference]: Without dead ends: 306 [2022-03-15 22:16:07,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:16:07,317 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:07,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:16:07,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-15 22:16:07,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 285. [2022-03-15 22:16:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.711267605633803) internal successors, (770), 284 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 770 transitions. [2022-03-15 22:16:07,320 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 770 transitions. Word has length 17 [2022-03-15 22:16:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:07,320 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 770 transitions. [2022-03-15 22:16:07,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 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 22:16:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 770 transitions. [2022-03-15 22:16:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:07,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:07,321 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:07,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 22:16:07,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-15 22:16:07,535 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1925954273, now seen corresponding path program 76 times [2022-03-15 22:16:07,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:07,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911022255] [2022-03-15 22:16:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:07,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:07,662 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 22:16:07,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:07,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911022255] [2022-03-15 22:16:07,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911022255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:07,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826852235] [2022-03-15 22:16:07,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:16:07,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:07,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:07,663 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 22:16:07,664 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 22:16:07,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:16:07,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:07,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:16:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:16:07,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:07,970 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 22:16:07,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826852235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:07,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:07,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 25 [2022-03-15 22:16:07,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1889845095] [2022-03-15 22:16:07,971 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:07,972 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:07,973 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2022-03-15 22:16:07,973 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:08,014 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [57369#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 57300#(< j2 M2)] [2022-03-15 22:16:08,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:16:08,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:16:08,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:16:08,015 INFO L87 Difference]: Start difference. First operand 285 states and 770 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 22:16:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:08,317 INFO L93 Difference]: Finished difference Result 420 states and 1083 transitions. [2022-03-15 22:16:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:16:08,317 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 17 [2022-03-15 22:16:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:08,318 INFO L225 Difference]: With dead ends: 420 [2022-03-15 22:16:08,318 INFO L226 Difference]: Without dead ends: 419 [2022-03-15 22:16:08,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:16:08,318 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:08,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:16:08,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-15 22:16:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 285. [2022-03-15 22:16:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.711267605633803) internal successors, (770), 284 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 770 transitions. [2022-03-15 22:16:08,322 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 770 transitions. Word has length 17 [2022-03-15 22:16:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:08,322 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 770 transitions. [2022-03-15 22:16:08,322 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 22:16:08,322 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 770 transitions. [2022-03-15 22:16:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:08,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:08,323 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:08,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-15 22:16:08,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-15 22:16:08,531 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:08,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:08,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1490021637, now seen corresponding path program 77 times [2022-03-15 22:16:08,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:08,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302968429] [2022-03-15 22:16:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:08,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:08,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:08,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302968429] [2022-03-15 22:16:08,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302968429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:08,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091765047] [2022-03-15 22:16:08,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:16:08,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:08,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:08,741 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 22:16:08,742 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 22:16:08,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 22:16:08,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:16:08,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:09,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:16:09,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091765047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:09,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:09,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 7] total 25 [2022-03-15 22:16:09,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1104425039] [2022-03-15 22:16:09,391 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:09,392 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:09,394 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 35 transitions. [2022-03-15 22:16:09,394 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:09,671 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [58513#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 58512#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 58511#(or (< j1 M1) (<= (+ j2 1) M2)), 58510#(< j1 M1), 58514#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:16:09,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:16:09,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:09,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:16:09,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:16:09,671 INFO L87 Difference]: Start difference. First operand 285 states and 770 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 22:16:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:10,799 INFO L93 Difference]: Finished difference Result 374 states and 959 transitions. [2022-03-15 22:16:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 22:16:10,799 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 17 [2022-03-15 22:16:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:10,800 INFO L225 Difference]: With dead ends: 374 [2022-03-15 22:16:10,800 INFO L226 Difference]: Without dead ends: 373 [2022-03-15 22:16:10,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=362, Invalid=2830, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 22:16:10,800 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 98 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:10,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 0 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:16:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-03-15 22:16:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 285. [2022-03-15 22:16:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.711267605633803) internal successors, (770), 284 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 770 transitions. [2022-03-15 22:16:10,804 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 770 transitions. Word has length 17 [2022-03-15 22:16:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:10,804 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 770 transitions. [2022-03-15 22:16:10,804 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 22:16:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 770 transitions. [2022-03-15 22:16:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:10,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:10,805 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:10,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 22:16:11,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:11,021 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:11,021 INFO L85 PathProgramCache]: Analyzing trace with hash -539729541, now seen corresponding path program 78 times [2022-03-15 22:16:11,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:11,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49598168] [2022-03-15 22:16:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:11,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:11,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:11,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49598168] [2022-03-15 22:16:11,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49598168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:11,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341799979] [2022-03-15 22:16:11,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:16:11,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:11,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:11,174 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 22:16:11,175 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 22:16:11,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:16:11,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:11,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:16:11,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:11,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:11,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341799979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:11,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:11,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 27 [2022-03-15 22:16:11,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1464892052] [2022-03-15 22:16:11,904 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:11,911 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:11,913 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2022-03-15 22:16:11,913 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:12,007 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [59638#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1)))), 59637#(or (< j2 M2) (< j1 M1) (= counter 0)), 59636#(or (< j1 M1) (= counter 0))] [2022-03-15 22:16:12,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:16:12,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:12,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:16:12,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:16:12,008 INFO L87 Difference]: Start difference. First operand 285 states and 770 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 22:16:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:12,703 INFO L93 Difference]: Finished difference Result 349 states and 896 transitions. [2022-03-15 22:16:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:16:12,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 22:16:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:12,705 INFO L225 Difference]: With dead ends: 349 [2022-03-15 22:16:12,705 INFO L226 Difference]: Without dead ends: 341 [2022-03-15 22:16:12,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:16:12,705 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:12,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:16:12,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-03-15 22:16:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 286. [2022-03-15 22:16:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.7087719298245614) internal successors, (772), 285 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 772 transitions. [2022-03-15 22:16:12,709 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 772 transitions. Word has length 17 [2022-03-15 22:16:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:12,709 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 772 transitions. [2022-03-15 22:16:12,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 22:16:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 772 transitions. [2022-03-15 22:16:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:12,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:12,709 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:12,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 22:16:12,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:12,919 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1712603429, now seen corresponding path program 79 times [2022-03-15 22:16:12,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:12,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889104615] [2022-03-15 22:16:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:12,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:13,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:13,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889104615] [2022-03-15 22:16:13,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889104615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:13,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399542011] [2022-03-15 22:16:13,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:16:13,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:13,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:13,128 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 22:16:13,129 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 22:16:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:13,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:16:13,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:13,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:13,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399542011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:13,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:13,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 28 [2022-03-15 22:16:13,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [184521788] [2022-03-15 22:16:13,948 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:13,949 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:13,951 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 22:16:13,951 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:14,145 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [60717#(or (< j1 M1) (= counter 0)), 60718#(or (< j2 M2) (< j1 M1) (= counter 0)), 60719#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 60716#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:16:14,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:16:14,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:16:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:16:14,146 INFO L87 Difference]: Start difference. First operand 286 states and 772 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 22:16:15,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:15,133 INFO L93 Difference]: Finished difference Result 446 states and 1110 transitions. [2022-03-15 22:16:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 22:16:15,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 22:16:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:15,134 INFO L225 Difference]: With dead ends: 446 [2022-03-15 22:16:15,134 INFO L226 Difference]: Without dead ends: 434 [2022-03-15 22:16:15,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=487, Invalid=2935, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 22:16:15,135 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:15,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:16:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-15 22:16:15,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 298. [2022-03-15 22:16:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:15,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2022-03-15 22:16:15,139 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 17 [2022-03-15 22:16:15,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:15,139 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2022-03-15 22:16:15,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 22:16:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2022-03-15 22:16:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:15,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:15,139 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:15,155 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 22:16:15,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:15,355 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1858068156, now seen corresponding path program 80 times [2022-03-15 22:16:15,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:15,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641825877] [2022-03-15 22:16:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:15,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:16:15,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:15,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641825877] [2022-03-15 22:16:15,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641825877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:15,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385894249] [2022-03-15 22:16:15,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:16:15,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:15,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:15,609 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 22:16:15,609 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 22:16:15,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:16:15,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:15,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:16:15,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:15,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:16:16,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385894249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:16,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:16,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 24 [2022-03-15 22:16:16,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [394268327] [2022-03-15 22:16:16,147 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:16,147 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:16,149 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2022-03-15 22:16:16,149 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:16,744 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [61933#(and (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= j1 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 61936#(and (or (< j1 M1) (not (<= j2 1)) (<= (+ 2 j2) M2)) (or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= (+ 2 j2) M2) (<= M2 3)) (or (< j1 M1) (<= 3 M2) (not (<= counter 0)) (<= (+ 2 j2) M2) (not (<= j2 2)))), 61934#(< j1 M1), 61938#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= 1 C)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= M2 3)) (or (< j1 M1) (<= 3 M2) (<= (+ 3 j2) M2)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2)))), 61937#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= M2 3)) (or (< j1 M1) (<= 3 M2) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2) (<= (+ counter 1) C))), 61935#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:16:16,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:16:16,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:16:16,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:16:16,745 INFO L87 Difference]: Start difference. First operand 298 states and 806 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 22:16:17,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:17,450 INFO L93 Difference]: Finished difference Result 325 states and 859 transitions. [2022-03-15 22:16:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:16:17,450 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 17 [2022-03-15 22:16:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:17,451 INFO L225 Difference]: With dead ends: 325 [2022-03-15 22:16:17,451 INFO L226 Difference]: Without dead ends: 315 [2022-03-15 22:16:17,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=268, Invalid=1624, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:16:17,451 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:17,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:16:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-03-15 22:16:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 300. [2022-03-15 22:16:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.702341137123746) internal successors, (808), 299 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 808 transitions. [2022-03-15 22:16:17,455 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 808 transitions. Word has length 17 [2022-03-15 22:16:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:17,455 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 808 transitions. [2022-03-15 22:16:17,455 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 22:16:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 808 transitions. [2022-03-15 22:16:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:17,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:17,456 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:17,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-15 22:16:17,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:17,672 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash 436012441, now seen corresponding path program 81 times [2022-03-15 22:16:17,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:17,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409407141] [2022-03-15 22:16:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:17,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:17,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:17,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409407141] [2022-03-15 22:16:17,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409407141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:17,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438213520] [2022-03-15 22:16:17,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:16:17,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:17,890 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 22:16:17,891 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 22:16:17,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 22:16:17,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:17,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:16:17,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:18,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:18,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438213520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:18,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:18,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 28 [2022-03-15 22:16:18,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1360734059] [2022-03-15 22:16:18,516 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:18,517 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:18,519 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 35 transitions. [2022-03-15 22:16:18,519 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:18,953 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [63016#(or (< j1 M1) (= counter 0)), 63020#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 63019#(and (or (< j1 M1) (<= j2 2) (<= (+ 3 j2) M2)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2)) (or (<= 4 M2) (< j1 M1) (<= (+ 3 j2) M2))), 63018#(and (or (< j1 M1) (<= (+ j2 1) M2)) (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2))), 63017#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:16:18,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:16:18,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:18,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:16:18,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:16:18,954 INFO L87 Difference]: Start difference. First operand 300 states and 808 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) 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 22:16:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:19,451 INFO L93 Difference]: Finished difference Result 361 states and 940 transitions. [2022-03-15 22:16:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:16:19,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) 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 17 [2022-03-15 22:16:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:19,452 INFO L225 Difference]: With dead ends: 361 [2022-03-15 22:16:19,452 INFO L226 Difference]: Without dead ends: 357 [2022-03-15 22:16:19,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:16:19,456 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:19,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:16:19,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-15 22:16:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 302. [2022-03-15 22:16:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.7043189368770766) internal successors, (814), 301 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 814 transitions. [2022-03-15 22:16:19,460 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 814 transitions. Word has length 17 [2022-03-15 22:16:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:19,461 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 814 transitions. [2022-03-15 22:16:19,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) 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 22:16:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 814 transitions. [2022-03-15 22:16:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:19,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:19,461 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:19,477 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 22:16:19,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:19,675 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:19,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2027696549, now seen corresponding path program 82 times [2022-03-15 22:16:19,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:19,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949696961] [2022-03-15 22:16:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:19,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:16:19,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:19,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949696961] [2022-03-15 22:16:19,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949696961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:19,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748302616] [2022-03-15 22:16:19,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:16:19,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:19,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:19,875 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 22:16:19,876 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 22:16:19,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:16:19,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:16:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:20,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:16:20,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748302616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:20,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:20,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2022-03-15 22:16:20,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2015223670] [2022-03-15 22:16:20,564 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:20,565 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:20,566 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 22:16:20,566 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:20,828 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [64131#(or (< j2 M2) (< j1 M1) (= counter 0)), 64130#(or (< j1 M1) (= counter 0)), 64132#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 64129#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:16:20,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:16:20,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:20,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:16:20,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:16:20,828 INFO L87 Difference]: Start difference. First operand 302 states and 814 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 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 22:16:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:21,244 INFO L93 Difference]: Finished difference Result 357 states and 927 transitions. [2022-03-15 22:16:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:16:21,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 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 22:16:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:21,245 INFO L225 Difference]: With dead ends: 357 [2022-03-15 22:16:21,245 INFO L226 Difference]: Without dead ends: 353 [2022-03-15 22:16:21,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:16:21,246 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:21,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:16:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-15 22:16:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 264. [2022-03-15 22:16:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.661596958174905) internal successors, (700), 263 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 700 transitions. [2022-03-15 22:16:21,251 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 700 transitions. Word has length 17 [2022-03-15 22:16:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:21,251 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 700 transitions. [2022-03-15 22:16:21,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 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 22:16:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 700 transitions. [2022-03-15 22:16:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:16:21,251 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:21,251 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:21,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-15 22:16:21,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-15 22:16:21,466 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:21,467 INFO L85 PathProgramCache]: Analyzing trace with hash 773624744, now seen corresponding path program 83 times [2022-03-15 22:16:21,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:21,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615644778] [2022-03-15 22:16:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:21,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:21,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:21,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615644778] [2022-03-15 22:16:21,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615644778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:21,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751379173] [2022-03-15 22:16:21,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:16:21,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:21,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:21,676 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 22:16:21,677 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 22:16:21,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:16:21,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 22:16:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:22,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:22,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751379173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:22,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:22,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2022-03-15 22:16:22,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [384704657] [2022-03-15 22:16:22,476 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:22,477 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:22,479 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 41 transitions. [2022-03-15 22:16:22,479 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:22,883 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [65172#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (<= counter 0) (< j1 M1) (not (= (+ (* (- 1) C) counter) counter))) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2)))), 65170#(and (or (<= M2 j2) (<= counter 0) (< j1 M1)) (or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2))), 65168#(or (< j1 M1) (<= (+ j2 1) M2)), 65169#(or (< j1 M1) (<= (+ 2 j2) M2)), 65167#(< j1 M1), 65171#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2)))] [2022-03-15 22:16:22,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:16:22,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:22,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:16:22,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:16:22,884 INFO L87 Difference]: Start difference. First operand 264 states and 700 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 22:16:23,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:23,297 INFO L93 Difference]: Finished difference Result 316 states and 806 transitions. [2022-03-15 22:16:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:16:23,298 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 17 [2022-03-15 22:16:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:23,298 INFO L225 Difference]: With dead ends: 316 [2022-03-15 22:16:23,298 INFO L226 Difference]: Without dead ends: 303 [2022-03-15 22:16:23,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:16:23,299 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:23,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:16:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-15 22:16:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 263. [2022-03-15 22:16:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.645038167938931) internal successors, (693), 262 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 693 transitions. [2022-03-15 22:16:23,302 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 693 transitions. Word has length 17 [2022-03-15 22:16:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:23,302 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 693 transitions. [2022-03-15 22:16:23,302 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 22:16:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 693 transitions. [2022-03-15 22:16:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:16:23,303 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:23,303 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:23,319 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 22:16:23,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:23,504 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:23,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1150564555, now seen corresponding path program 84 times [2022-03-15 22:16:23,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:23,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7768473] [2022-03-15 22:16:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:23,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:16:23,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:23,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7768473] [2022-03-15 22:16:23,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7768473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:23,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883245849] [2022-03-15 22:16:23,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:16:23,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:23,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:23,677 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 22:16:23,678 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 22:16:23,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:16:23,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:23,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:16:23,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:23,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:24,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883245849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:24,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:24,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-03-15 22:16:24,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1791354693] [2022-03-15 22:16:24,117 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:24,118 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:24,120 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 56 transitions. [2022-03-15 22:16:24,120 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:25,114 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [66178#(and (or (<= M1 (+ 2 j1)) (<= 4 M2) (< (+ 3 j1) M1)) (or (<= M1 (+ 2 j1)) (<= M2 4) (< (+ 3 j1) M1)) (or (<= M1 (+ 2 j1)) (< (+ 3 j1) M1) (<= M2 (+ j2 4)))), 66170#(or (< j1 M1) (<= (+ j2 1) M2)), 66175#(and (or (<= 4 M2) (< j1 M1)) (or (< j1 M1) (<= M2 (+ j2 4))) (or (<= M2 4) (< j1 M1))), 66171#(and (or (<= M2 j2) (<= counter 0) (< j1 M1)) (or (not (<= j2 3)) (<= 4 M2) (< j1 M1) (not (<= counter 0))) (or (<= 4 M2) (< j1 M1) (not (<= j2 2))) (or (<= M2 4) (<= j2 3) (< j1 M1))), 66179#(and (or (<= M2 4) (<= M1 (+ 3 j1)) (< (+ j1 4) M1)) (or (<= M1 (+ 3 j1)) (<= M2 (+ j2 4)) (< (+ j1 4) M1)) (or (<= M1 (+ 3 j1)) (<= 4 M2) (< (+ j1 4) M1))), 66169#(< j1 M1), 66172#(and (or (<= 4 M2) (< j1 M1)) (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1)) (<= (+ counter 1) C)) (or (<= M2 4) (< j1 M1))), 66177#(and (or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= M2 (+ j2 4))) (or (< (+ 2 j1) M1) (<= M2 4) (<= M1 (+ j1 1))) (or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= 4 M2))), 66173#(and (or (<= 4 M2) (< j1 M1)) (or (<= counter 0) (< j1 M1) (<= 1 (+ C counter))) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2))) (or (<= M2 4) (< j1 M1))), 66176#(and (or (<= M2 4) (< (+ j1 1) M1) (<= M1 j1)) (or (<= M2 (+ j2 4)) (< (+ j1 1) M1) (<= M1 j1)) (or (<= 4 M2) (< (+ j1 1) M1) (<= M1 j1))), 66174#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ 3 j2))) (or (<= 4 M2) (< j1 M1)) (or (<= M2 4) (< j1 M1)))] [2022-03-15 22:16:25,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:16:25,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:16:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:16:25,118 INFO L87 Difference]: Start difference. First operand 263 states and 693 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:26,336 INFO L93 Difference]: Finished difference Result 472 states and 1175 transitions. [2022-03-15 22:16:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 22:16:26,336 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:16:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:26,346 INFO L225 Difference]: With dead ends: 472 [2022-03-15 22:16:26,346 INFO L226 Difference]: Without dead ends: 445 [2022-03-15 22:16:26,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=515, Invalid=3645, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:16:26,347 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 139 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:26,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 0 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:16:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-03-15 22:16:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 375. [2022-03-15 22:16:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.663101604278075) internal successors, (996), 374 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 22:16:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 996 transitions. [2022-03-15 22:16:26,352 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 996 transitions. Word has length 18 [2022-03-15 22:16:26,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:26,352 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 996 transitions. [2022-03-15 22:16:26,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 996 transitions. [2022-03-15 22:16:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:16:26,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:26,352 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:26,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-15 22:16:26,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:26,568 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1312925358, now seen corresponding path program 85 times [2022-03-15 22:16:26,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:26,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976509658] [2022-03-15 22:16:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:26,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:26,800 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 22:16:26,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:26,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976509658] [2022-03-15 22:16:26,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976509658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:26,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064968898] [2022-03-15 22:16:26,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:16:26,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:26,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:26,802 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 22:16:26,804 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 22:16:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:26,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:16:26,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:27,080 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 22:16:27,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:27,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064968898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:27,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:27,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2022-03-15 22:16:27,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [758974528] [2022-03-15 22:16:27,369 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:27,370 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:27,372 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 54 transitions. [2022-03-15 22:16:27,373 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:28,547 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [67593#(and (or (not (< j1 M1)) (<= (+ 5 j2) M2) (< (+ j1 1) M1)) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= counter (* C 4))) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (* C 4) counter))), 67594#(and (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= (* 3 C) counter)) (or (< (+ 2 j1) M1) (<= counter (* 3 C)) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= (+ 5 j2) M2) (not (< (+ j1 1) M1)))), 67587#(or (< j2 M2) (< j1 M1) (= counter 0)), 67591#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* C 4) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= counter (* C 4))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter))), 67588#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 67595#(and (or (<= counter (* 2 C)) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= (* 2 C) counter)) (or (<= (+ 5 j2) M2) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)))), 67596#(and (or (not (< (+ 3 j1) M1)) (<= C counter) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (<= (+ 5 j2) M2) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (<= counter C) (< (+ j1 4) M1))), 67589#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 67586#(or (< j1 M1) (= counter 0)), 67592#(and (or (< j1 M1) (<= (+ 5 j2) M2)) (or (< j1 M1) (<= counter (* 5 C))) (or (< j1 M1) (<= (* 5 C) counter))), 67590#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 67597#(and (or (not (< (+ j1 4) M1)) (<= (+ 5 j2) M2) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (<= counter 0) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (<= 0 counter) (< (+ 5 j1) M1)))] [2022-03-15 22:16:28,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 22:16:28,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:28,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 22:16:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:16:28,547 INFO L87 Difference]: Start difference. First operand 375 states and 996 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:30,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:30,592 INFO L93 Difference]: Finished difference Result 597 states and 1445 transitions. [2022-03-15 22:16:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:16:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:16:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:30,594 INFO L225 Difference]: With dead ends: 597 [2022-03-15 22:16:30,594 INFO L226 Difference]: Without dead ends: 590 [2022-03-15 22:16:30,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=644, Invalid=3912, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 22:16:30,594 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 209 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:30,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 0 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:16:30,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-03-15 22:16:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 394. [2022-03-15 22:16:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.6666666666666665) internal successors, (1048), 393 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1048 transitions. [2022-03-15 22:16:30,600 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1048 transitions. Word has length 18 [2022-03-15 22:16:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:30,600 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1048 transitions. [2022-03-15 22:16:30,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1048 transitions. [2022-03-15 22:16:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:16:30,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:30,601 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:30,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-15 22:16:30,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:30,803 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2071434146, now seen corresponding path program 86 times [2022-03-15 22:16:30,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:30,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853660100] [2022-03-15 22:16:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:31,035 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 22:16:31,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:31,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853660100] [2022-03-15 22:16:31,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853660100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:31,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197406354] [2022-03-15 22:16:31,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:16:31,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:31,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:31,036 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 22:16:31,037 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 22:16:31,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:16:31,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:16:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:31,464 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 22:16:31,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:16:31,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197406354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:31,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:31,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 30 [2022-03-15 22:16:31,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1119664374] [2022-03-15 22:16:31,766 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:31,767 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:31,769 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 46 transitions. [2022-03-15 22:16:31,769 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:32,380 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [69163#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 69168#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 69169#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 69162#(or (< j2 M2) (< j1 M1) (= counter 0)), 69165#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 69167#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 69164#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 69166#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 69161#(or (< j1 M1) (= counter 0))] [2022-03-15 22:16:32,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:16:32,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:16:32,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:16:32,380 INFO L87 Difference]: Start difference. First operand 394 states and 1048 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:36,156 INFO L93 Difference]: Finished difference Result 697 states and 1594 transitions. [2022-03-15 22:16:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 22:16:36,157 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:16:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:36,158 INFO L225 Difference]: With dead ends: 697 [2022-03-15 22:16:36,158 INFO L226 Difference]: Without dead ends: 684 [2022-03-15 22:16:36,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1041, Invalid=6441, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 22:16:36,158 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:36,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 22:16:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-15 22:16:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 404. [2022-03-15 22:16:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.6550868486352357) internal successors, (1070), 403 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1070 transitions. [2022-03-15 22:16:36,164 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1070 transitions. Word has length 18 [2022-03-15 22:16:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:36,164 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1070 transitions. [2022-03-15 22:16:36,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:36,164 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1070 transitions. [2022-03-15 22:16:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:16:36,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:36,165 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:36,213 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 22:16:36,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:36,366 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:36,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:36,366 INFO L85 PathProgramCache]: Analyzing trace with hash -125966058, now seen corresponding path program 87 times [2022-03-15 22:16:36,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:36,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003919153] [2022-03-15 22:16:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:36,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:36,599 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 22:16:36,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:36,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003919153] [2022-03-15 22:16:36,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003919153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:36,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661816768] [2022-03-15 22:16:36,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:16:36,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:36,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:36,600 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 22:16:36,601 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 22:16:36,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:16:36,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:36,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:16:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:37,038 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 22:16:37,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:16:37,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661816768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:37,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:37,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 31 [2022-03-15 22:16:37,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [164509682] [2022-03-15 22:16:37,396 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:37,397 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:37,399 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 42 transitions. [2022-03-15 22:16:37,400 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:38,018 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [70902#(or (< j1 M1) (= counter 0)), 70905#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 70906#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 70903#(or (< j2 M2) (< j1 M1) (= counter 0)), 70904#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 70907#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 70908#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 70909#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0)))] [2022-03-15 22:16:38,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:16:38,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:16:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:16:38,019 INFO L87 Difference]: Start difference. First operand 404 states and 1070 transitions. Second operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 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 22:16:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:40,596 INFO L93 Difference]: Finished difference Result 739 states and 1675 transitions. [2022-03-15 22:16:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 22:16:40,596 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 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 18 [2022-03-15 22:16:40,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:40,598 INFO L225 Difference]: With dead ends: 739 [2022-03-15 22:16:40,598 INFO L226 Difference]: Without dead ends: 726 [2022-03-15 22:16:40,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=845, Invalid=5635, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 22:16:40,598 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 160 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:40,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 0 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:16:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-03-15 22:16:40,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 408. [2022-03-15 22:16:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.660933660933661) internal successors, (1083), 407 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1083 transitions. [2022-03-15 22:16:40,605 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1083 transitions. Word has length 18 [2022-03-15 22:16:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:40,605 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1083 transitions. [2022-03-15 22:16:40,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 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 22:16:40,605 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1083 transitions. [2022-03-15 22:16:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:16:40,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:40,606 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:40,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-15 22:16:40,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:40,820 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1465718050, now seen corresponding path program 88 times [2022-03-15 22:16:40,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:40,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781108049] [2022-03-15 22:16:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:41,064 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 22:16:41,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:41,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781108049] [2022-03-15 22:16:41,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781108049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:41,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023677119] [2022-03-15 22:16:41,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:16:41,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:41,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:41,065 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 22:16:41,066 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 22:16:41,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:16:41,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:41,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:16:41,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:41,385 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 22:16:41,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:16:41,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023677119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:41,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:41,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 31 [2022-03-15 22:16:41,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1785771939] [2022-03-15 22:16:41,740 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:41,740 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:41,743 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2022-03-15 22:16:41,743 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:42,201 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [72682#(or (< j1 M1) (= counter 0)), 72681#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 72683#(or (< j2 M2) (< j1 M1) (= counter 0)), 72684#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 72680#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 72686#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 72685#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:16:42,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:16:42,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:16:42,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:16:42,202 INFO L87 Difference]: Start difference. First operand 408 states and 1083 transitions. Second operand has 22 states, 21 states have (on average 1.6666666666666667) 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 22:16:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:45,802 INFO L93 Difference]: Finished difference Result 784 states and 1768 transitions. [2022-03-15 22:16:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 22:16:45,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.6666666666666667) 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 18 [2022-03-15 22:16:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:45,804 INFO L225 Difference]: With dead ends: 784 [2022-03-15 22:16:45,804 INFO L226 Difference]: Without dead ends: 770 [2022-03-15 22:16:45,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=862, Invalid=5944, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 22:16:45,805 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 180 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:45,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 0 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:16:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-15 22:16:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 438. [2022-03-15 22:16:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.688787185354691) internal successors, (1175), 437 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1175 transitions. [2022-03-15 22:16:45,811 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1175 transitions. Word has length 18 [2022-03-15 22:16:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:45,811 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1175 transitions. [2022-03-15 22:16:45,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.6666666666666667) 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 22:16:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1175 transitions. [2022-03-15 22:16:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:16:45,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:45,812 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:45,828 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 22:16:46,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-15 22:16:46,027 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash 824326038, now seen corresponding path program 89 times [2022-03-15 22:16:46,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:46,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249316072] [2022-03-15 22:16:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:46,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:46,198 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 22:16:46,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:46,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249316072] [2022-03-15 22:16:46,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249316072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:46,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376302651] [2022-03-15 22:16:46,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:16:46,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:46,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:46,199 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 22:16:46,200 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 22:16:46,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:16:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:46,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:16:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:46,538 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 22:16:46,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:47,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376302651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:47,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:47,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2022-03-15 22:16:47,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1829587764] [2022-03-15 22:16:47,117 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:47,118 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:47,120 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2022-03-15 22:16:47,120 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:47,358 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [74574#(or (< j2 M2) (< j1 M1) (= counter 0)), 74570#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 74569#(or (< j1 M1) (= counter 0)), 74573#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 74571#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 74572#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:16:47,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:16:47,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:16:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:16:47,358 INFO L87 Difference]: Start difference. First operand 438 states and 1175 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 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 22:16:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:50,926 INFO L93 Difference]: Finished difference Result 902 states and 2002 transitions. [2022-03-15 22:16:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 22:16:50,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 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 22:16:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:50,928 INFO L225 Difference]: With dead ends: 902 [2022-03-15 22:16:50,928 INFO L226 Difference]: Without dead ends: 887 [2022-03-15 22:16:50,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=971, Invalid=6001, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 22:16:50,929 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 179 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:50,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 0 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:16:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-03-15 22:16:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 459. [2022-03-15 22:16:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.7248908296943233) internal successors, (1248), 458 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1248 transitions. [2022-03-15 22:16:50,944 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1248 transitions. Word has length 18 [2022-03-15 22:16:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:50,945 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1248 transitions. [2022-03-15 22:16:50,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 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 22:16:50,945 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1248 transitions. [2022-03-15 22:16:50,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:16:50,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:50,945 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:50,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-15 22:16:51,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:51,159 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1212580560, now seen corresponding path program 90 times [2022-03-15 22:16:51,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:51,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003779709] [2022-03-15 22:16:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:51,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:51,451 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 22:16:51,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:51,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003779709] [2022-03-15 22:16:51,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003779709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:51,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26892030] [2022-03-15 22:16:51,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:16:51,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:51,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:51,453 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 22:16:51,454 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 22:16:51,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:16:51,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:16:51,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:16:51,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:51,889 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 22:16:51,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:16:52,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26892030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:52,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:52,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 30 [2022-03-15 22:16:52,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1195299766] [2022-03-15 22:16:52,112 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:52,112 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:52,115 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 44 transitions. [2022-03-15 22:16:52,115 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:52,708 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [76619#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 76617#(or (< j1 M1) (= counter 0)), 76620#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 76623#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 76622#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 76618#(or (< j2 M2) (< j1 M1) (= counter 0)), 76624#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 76621#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1))))] [2022-03-15 22:16:52,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:16:52,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:52,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:16:52,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:16:52,709 INFO L87 Difference]: Start difference. First operand 459 states and 1248 transitions. Second operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:57,640 INFO L93 Difference]: Finished difference Result 855 states and 2008 transitions. [2022-03-15 22:16:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 22:16:57,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:16:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:57,642 INFO L225 Difference]: With dead ends: 855 [2022-03-15 22:16:57,642 INFO L226 Difference]: Without dead ends: 845 [2022-03-15 22:16:57,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2706 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1422, Invalid=10134, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 22:16:57,643 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 169 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:57,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 0 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:16:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-03-15 22:16:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 468. [2022-03-15 22:16:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.7301927194860816) internal successors, (1275), 467 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1275 transitions. [2022-03-15 22:16:57,650 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1275 transitions. Word has length 18 [2022-03-15 22:16:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:57,650 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1275 transitions. [2022-03-15 22:16:57,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1275 transitions. [2022-03-15 22:16:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:16:57,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:57,650 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:57,666 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 22:16:57,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:57,863 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:16:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:16:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1594442708, now seen corresponding path program 91 times [2022-03-15 22:16:57,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:16:57,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651172728] [2022-03-15 22:16:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:16:57,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:16:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:58,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:16:58,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651172728] [2022-03-15 22:16:58,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651172728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:16:58,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493998600] [2022-03-15 22:16:58,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:16:58,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:16:58,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:16:58,092 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 22:16:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:16:58,114 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 22:16:58,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 22:16:58,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:16:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:58,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:16:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:16:59,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493998600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:16:59,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:16:59,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2022-03-15 22:16:59,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [795405692] [2022-03-15 22:16:59,428 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:16:59,429 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:16:59,430 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:16:59,430 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:16:59,572 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [78690#(< j2 M2), 78687#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 78688#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 78689#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:16:59,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:16:59,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:16:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:16:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:16:59,573 INFO L87 Difference]: Start difference. First operand 468 states and 1275 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 22:16:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:16:59,887 INFO L93 Difference]: Finished difference Result 732 states and 1896 transitions. [2022-03-15 22:16:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:16:59,887 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 18 [2022-03-15 22:16:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:16:59,888 INFO L225 Difference]: With dead ends: 732 [2022-03-15 22:16:59,888 INFO L226 Difference]: Without dead ends: 731 [2022-03-15 22:16:59,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:16:59,889 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:16:59,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:16:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-15 22:16:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 484. [2022-03-15 22:16:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.739130434782609) internal successors, (1323), 483 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:16:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1323 transitions. [2022-03-15 22:16:59,896 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1323 transitions. Word has length 18 [2022-03-15 22:16:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:16:59,896 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1323 transitions. [2022-03-15 22:16:59,896 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 22:16:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1323 transitions. [2022-03-15 22:16:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:16:59,896 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:16:59,897 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:16:59,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 22:17:00,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:00,112 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:00,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1285435377, now seen corresponding path program 92 times [2022-03-15 22:17:00,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:00,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138047740] [2022-03-15 22:17:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:00,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:00,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:00,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138047740] [2022-03-15 22:17:00,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138047740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:00,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151362947] [2022-03-15 22:17:00,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:17:00,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:00,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:00,333 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 22:17:00,334 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 22:17:00,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:17:00,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:17:00,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:00,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:00,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151362947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:00,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:00,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 29 [2022-03-15 22:17:00,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [540967394] [2022-03-15 22:17:00,918 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:00,919 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:00,921 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 44 transitions. [2022-03-15 22:17:00,921 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:01,449 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [80551#(< j1 M1), 80555#(or (< j1 M1) (<= (+ 2 j2) M2)), 80558#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 80557#(and (or (<= j1 j2) (not (< (+ 2 j1) M1))) (or (<= j2 j1) (not (<= (+ (* 3 C) counter) 0)) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 80553#(and (or (<= j1 (+ j2 1)) (not (< (+ j1 1) M1))) (or (not (<= (+ (* 2 C) counter) 0)) (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 80554#(or (< j1 M1) (<= (+ j2 1) M2)), 80556#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 80552#(and (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 2 j2))) (or (not (< j1 M1)) (<= (+ 2 j2) j1) (not (<= (+ C counter) 0))))] [2022-03-15 22:17:01,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:17:01,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:17:01,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:17:01,450 INFO L87 Difference]: Start difference. First operand 484 states and 1323 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 22:17:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:02,994 INFO L93 Difference]: Finished difference Result 635 states and 1574 transitions. [2022-03-15 22:17:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:17:02,994 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 18 [2022-03-15 22:17:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:02,995 INFO L225 Difference]: With dead ends: 635 [2022-03-15 22:17:02,995 INFO L226 Difference]: Without dead ends: 607 [2022-03-15 22:17:02,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=399, Invalid=3383, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 22:17:02,995 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:02,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:17:02,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-03-15 22:17:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 482. [2022-03-15 22:17:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.738045738045738) internal successors, (1317), 481 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1317 transitions. [2022-03-15 22:17:03,001 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1317 transitions. Word has length 18 [2022-03-15 22:17:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:03,002 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1317 transitions. [2022-03-15 22:17:03,002 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 22:17:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1317 transitions. [2022-03-15 22:17:03,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:03,002 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:03,002 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:03,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 22:17:03,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:03,207 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash -715451322, now seen corresponding path program 93 times [2022-03-15 22:17:03,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:03,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455281964] [2022-03-15 22:17:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:03,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:03,417 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 22:17:03,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:03,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455281964] [2022-03-15 22:17:03,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455281964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:03,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151541391] [2022-03-15 22:17:03,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:17:03,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:03,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:03,418 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 22:17:03,419 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 22:17:03,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:17:03,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:03,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:17:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:03,864 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 22:17:03,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:17:04,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151541391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:04,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:04,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 7] total 27 [2022-03-15 22:17:04,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1443962783] [2022-03-15 22:17:04,138 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:04,139 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:04,141 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2022-03-15 22:17:04,142 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:04,668 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [82339#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 82340#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 82341#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 82337#(or (< j1 M1) (= counter 0)), 82338#(or (< j2 M2) (< j1 M1) (= counter 0)), 82342#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 82343#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:17:04,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:17:04,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:17:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:17:04,668 INFO L87 Difference]: Start difference. First operand 482 states and 1317 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:08,131 INFO L93 Difference]: Finished difference Result 840 states and 1999 transitions. [2022-03-15 22:17:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 22:17:08,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:08,133 INFO L225 Difference]: With dead ends: 840 [2022-03-15 22:17:08,133 INFO L226 Difference]: Without dead ends: 830 [2022-03-15 22:17:08,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=859, Invalid=5947, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 22:17:08,133 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 141 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:08,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 0 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:17:08,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-03-15 22:17:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 488. [2022-03-15 22:17:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.7371663244353184) internal successors, (1333), 487 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1333 transitions. [2022-03-15 22:17:08,140 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1333 transitions. Word has length 18 [2022-03-15 22:17:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:08,140 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1333 transitions. [2022-03-15 22:17:08,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1333 transitions. [2022-03-15 22:17:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:08,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:08,141 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:08,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-15 22:17:08,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:08,351 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1100086734, now seen corresponding path program 94 times [2022-03-15 22:17:08,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:08,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681761402] [2022-03-15 22:17:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:08,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:08,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:08,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681761402] [2022-03-15 22:17:08,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681761402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:08,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636878669] [2022-03-15 22:17:08,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:17:08,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:08,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:08,528 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 22:17:08,555 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 22:17:08,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:17:08,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:08,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 22:17:08,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:09,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:10,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636878669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:10,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:10,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2022-03-15 22:17:10,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1641083509] [2022-03-15 22:17:10,149 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:10,150 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:10,152 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:17:10,152 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:10,358 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [84392#(< j2 M2), 84389#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 84391#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 84390#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:17:10,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:17:10,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:10,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:17:10,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:17:10,359 INFO L87 Difference]: Start difference. First operand 488 states and 1333 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 22:17:10,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:10,707 INFO L93 Difference]: Finished difference Result 699 states and 1821 transitions. [2022-03-15 22:17:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:17:10,707 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 18 [2022-03-15 22:17:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:10,708 INFO L225 Difference]: With dead ends: 699 [2022-03-15 22:17:10,708 INFO L226 Difference]: Without dead ends: 698 [2022-03-15 22:17:10,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=571, Invalid=1879, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:17:10,709 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:10,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:17:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-15 22:17:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 487. [2022-03-15 22:17:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.7386831275720165) internal successors, (1331), 486 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1331 transitions. [2022-03-15 22:17:10,715 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1331 transitions. Word has length 18 [2022-03-15 22:17:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:10,716 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1331 transitions. [2022-03-15 22:17:10,716 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 22:17:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1331 transitions. [2022-03-15 22:17:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:10,717 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:10,717 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:10,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 22:17:10,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-15 22:17:10,917 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:10,918 INFO L85 PathProgramCache]: Analyzing trace with hash -911964827, now seen corresponding path program 95 times [2022-03-15 22:17:10,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:10,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168747223] [2022-03-15 22:17:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:10,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:11,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:11,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168747223] [2022-03-15 22:17:11,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168747223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:11,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310213701] [2022-03-15 22:17:11,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:17:11,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:11,124 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 22:17:11,125 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 22:17:11,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:17:11,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:11,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 22:17:11,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:11,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:11,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310213701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:11,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:11,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 30 [2022-03-15 22:17:11,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [28099513] [2022-03-15 22:17:11,711 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:11,712 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:11,714 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2022-03-15 22:17:11,714 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:12,083 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [86230#(and (or (<= j1 (+ j2 1)) (not (< (+ j1 1) M1))) (or (not (<= (+ (* 2 C) counter) 0)) (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 86227#(or (< j1 M1) (<= (+ 2 j2) M2)), 86228#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 86225#(< j1 M1), 86229#(and (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 2 j2))) (or (not (< j1 M1)) (<= (+ 2 j2) j1) (not (<= (+ C counter) 0)))), 86226#(or (< j1 M1) (<= (+ j2 1) M2)), 86231#(and (or (<= j1 j2) (not (< (+ 2 j1) M1))) (or (<= j2 j1) (not (<= (+ (* 3 C) counter) 0)) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:17:12,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:17:12,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:17:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:17:12,083 INFO L87 Difference]: Start difference. First operand 487 states and 1331 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:13,556 INFO L93 Difference]: Finished difference Result 628 states and 1571 transitions. [2022-03-15 22:17:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 22:17:13,557 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:13,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:13,558 INFO L225 Difference]: With dead ends: 628 [2022-03-15 22:17:13,558 INFO L226 Difference]: Without dead ends: 628 [2022-03-15 22:17:13,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=401, Invalid=3505, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 22:17:13,558 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:13,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:17:13,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-15 22:17:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 487. [2022-03-15 22:17:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.7386831275720165) internal successors, (1331), 486 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1331 transitions. [2022-03-15 22:17:13,565 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1331 transitions. Word has length 18 [2022-03-15 22:17:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:13,565 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1331 transitions. [2022-03-15 22:17:13,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1331 transitions. [2022-03-15 22:17:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:13,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:13,566 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:13,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-15 22:17:13,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 22:17:13,766 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1807793552, now seen corresponding path program 96 times [2022-03-15 22:17:13,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:13,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593467468] [2022-03-15 22:17:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:13,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:13,996 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 22:17:13,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:13,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593467468] [2022-03-15 22:17:13,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593467468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:13,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765067110] [2022-03-15 22:17:13,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:17:13,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:13,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:13,998 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 22:17:13,999 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 22:17:14,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:17:14,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:14,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:17:14,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:14,392 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 22:17:14,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:14,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765067110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:14,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:14,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-03-15 22:17:14,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1735000420] [2022-03-15 22:17:14,876 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:14,877 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:14,879 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 36 transitions. [2022-03-15 22:17:14,879 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:15,209 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [88019#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 88020#(or (< j1 M1) (= counter 0)), 88022#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 88024#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 88021#(or (< j2 M2) (< j1 M1) (= counter 0)), 88023#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:17:15,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:17:15,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:15,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:17:15,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:17:15,210 INFO L87 Difference]: Start difference. First operand 487 states and 1331 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) 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 22:17:16,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:16,700 INFO L93 Difference]: Finished difference Result 730 states and 1761 transitions. [2022-03-15 22:17:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:17:16,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) 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 18 [2022-03-15 22:17:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:16,702 INFO L225 Difference]: With dead ends: 730 [2022-03-15 22:17:16,702 INFO L226 Difference]: Without dead ends: 720 [2022-03-15 22:17:16,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=535, Invalid=3371, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 22:17:16,702 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:16,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:17:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-03-15 22:17:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 497. [2022-03-15 22:17:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.7358870967741935) internal successors, (1357), 496 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1357 transitions. [2022-03-15 22:17:16,708 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1357 transitions. Word has length 18 [2022-03-15 22:17:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:16,708 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1357 transitions. [2022-03-15 22:17:16,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) 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 22:17:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1357 transitions. [2022-03-15 22:17:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:16,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:16,709 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:16,726 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 22:17:16,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:16,913 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:16,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1583939604, now seen corresponding path program 97 times [2022-03-15 22:17:16,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:16,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867086007] [2022-03-15 22:17:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:16,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:17,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:17,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867086007] [2022-03-15 22:17:17,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867086007] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:17,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522599696] [2022-03-15 22:17:17,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:17:17,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:17,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:17,126 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 22:17:17,155 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 22:17:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:17,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:17:17,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:17,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:17:17,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522599696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:17,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:17,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2022-03-15 22:17:17,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [989093237] [2022-03-15 22:17:17,556 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:17,557 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:17,558 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:17:17,558 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:17,752 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [89853#(< j2 M2), 89927#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 89928#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 89926#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1))))] [2022-03-15 22:17:17,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:17:17,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:17,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:17:17,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:17:17,753 INFO L87 Difference]: Start difference. First operand 497 states and 1357 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 22:17:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:18,042 INFO L93 Difference]: Finished difference Result 722 states and 1873 transitions. [2022-03-15 22:17:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:17:18,043 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 18 [2022-03-15 22:17:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:18,044 INFO L225 Difference]: With dead ends: 722 [2022-03-15 22:17:18,044 INFO L226 Difference]: Without dead ends: 721 [2022-03-15 22:17:18,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:17:18,045 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:18,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:17:18,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-03-15 22:17:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 497. [2022-03-15 22:17:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.7278225806451615) internal successors, (1353), 496 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1353 transitions. [2022-03-15 22:17:18,052 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1353 transitions. Word has length 18 [2022-03-15 22:17:18,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:18,052 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1353 transitions. [2022-03-15 22:17:18,052 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 22:17:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1353 transitions. [2022-03-15 22:17:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:18,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:18,054 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:18,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 22:17:18,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:18,263 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:18,263 INFO L85 PathProgramCache]: Analyzing trace with hash 679719281, now seen corresponding path program 98 times [2022-03-15 22:17:18,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:18,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993339610] [2022-03-15 22:17:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:18,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:18,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:18,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993339610] [2022-03-15 22:17:18,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993339610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:18,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250570486] [2022-03-15 22:17:18,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:17:18,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:18,509 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 22:17:18,510 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 22:17:18,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:17:18,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:17:18,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:18,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:19,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250570486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:19,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:19,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 29 [2022-03-15 22:17:19,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [294104064] [2022-03-15 22:17:19,028 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:19,030 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:19,033 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 36 transitions. [2022-03-15 22:17:19,033 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:19,318 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [91806#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 91807#(and (or (<= j1 (+ j2 1)) (not (< (+ j1 1) M1))) (or (not (<= (+ (* 2 C) counter) 0)) (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 91808#(and (or (<= j1 j2) (not (< (+ 2 j1) M1))) (or (<= j2 j1) (not (<= (+ (* 3 C) counter) 0)) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 91804#(< j1 M1), 91803#(and (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (<= j1 (+ 2 j2))) (or (not (< j1 M1)) (<= (+ 2 j2) j1) (not (<= (+ C counter) 0)))), 91805#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:17:19,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:17:19,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:19,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:17:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:17:19,318 INFO L87 Difference]: Start difference. First operand 497 states and 1353 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 22:17:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:20,524 INFO L93 Difference]: Finished difference Result 653 states and 1659 transitions. [2022-03-15 22:17:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:17:20,524 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 18 [2022-03-15 22:17:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:20,525 INFO L225 Difference]: With dead ends: 653 [2022-03-15 22:17:20,525 INFO L226 Difference]: Without dead ends: 652 [2022-03-15 22:17:20,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 22:17:20,526 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:20,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 0 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:17:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-03-15 22:17:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 499. [2022-03-15 22:17:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.7269076305220885) internal successors, (1358), 498 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1358 transitions. [2022-03-15 22:17:20,532 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1358 transitions. Word has length 18 [2022-03-15 22:17:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:20,532 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1358 transitions. [2022-03-15 22:17:20,532 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 22:17:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1358 transitions. [2022-03-15 22:17:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:20,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:20,532 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:20,569 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 22:17:20,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-15 22:17:20,743 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1704483066, now seen corresponding path program 99 times [2022-03-15 22:17:20,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:20,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12178728] [2022-03-15 22:17:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:20,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:20,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:20,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12178728] [2022-03-15 22:17:20,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12178728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:20,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219889354] [2022-03-15 22:17:20,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:17:20,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:20,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:20,914 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 22:17:20,915 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 22:17:20,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:17:20,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:20,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 22:17:20,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:21,464 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 22:17:21,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:22,171 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 22:17:22,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219889354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:22,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:22,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 33 [2022-03-15 22:17:22,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2090724080] [2022-03-15 22:17:22,172 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:22,173 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:22,175 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 22:17:22,175 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:22,391 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [93650#(or (< j1 M1) (<= (+ j2 1) M2)), 93649#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 93646#(< j1 M1), 93647#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 93648#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:17:22,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:17:22,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:17:22,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:17:22,392 INFO L87 Difference]: Start difference. First operand 499 states and 1358 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:17:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:23,354 INFO L93 Difference]: Finished difference Result 941 states and 2363 transitions. [2022-03-15 22:17:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:17:23,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:23,356 INFO L225 Difference]: With dead ends: 941 [2022-03-15 22:17:23,356 INFO L226 Difference]: Without dead ends: 941 [2022-03-15 22:17:23,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=803, Invalid=3103, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 22:17:23,357 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:23,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:17:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-15 22:17:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 537. [2022-03-15 22:17:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 2.7611940298507465) internal successors, (1480), 536 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1480 transitions. [2022-03-15 22:17:23,364 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1480 transitions. Word has length 18 [2022-03-15 22:17:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:23,364 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1480 transitions. [2022-03-15 22:17:23,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:17:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1480 transitions. [2022-03-15 22:17:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:23,365 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:23,365 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:23,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-15 22:17:23,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:23,581 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash 38327269, now seen corresponding path program 100 times [2022-03-15 22:17:23,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:23,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880863355] [2022-03-15 22:17:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:23,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:23,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:23,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880863355] [2022-03-15 22:17:23,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880863355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:23,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060904351] [2022-03-15 22:17:23,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:17:23,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:23,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:23,815 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 22:17:23,816 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 22:17:23,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:17:23,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:23,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:17:23,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:24,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:24,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060904351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:24,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:24,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 30 [2022-03-15 22:17:24,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [315697368] [2022-03-15 22:17:24,814 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:24,815 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:24,817 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 22:17:24,817 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:25,027 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [95848#(or (< j1 M1) (= counter 0)), 95849#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 95850#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 95852#(or (< j2 M2) (< j1 M1) (= counter 0)), 95851#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:17:25,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:17:25,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:25,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:17:25,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:17:25,027 INFO L87 Difference]: Start difference. First operand 537 states and 1480 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:17:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:26,533 INFO L93 Difference]: Finished difference Result 699 states and 1779 transitions. [2022-03-15 22:17:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 22:17:26,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:26,534 INFO L225 Difference]: With dead ends: 699 [2022-03-15 22:17:26,534 INFO L226 Difference]: Without dead ends: 692 [2022-03-15 22:17:26,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=565, Invalid=3595, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:17:26,535 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 104 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:26,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 0 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:17:26,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-03-15 22:17:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 538. [2022-03-15 22:17:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.7597765363128492) internal successors, (1482), 537 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1482 transitions. [2022-03-15 22:17:26,547 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1482 transitions. Word has length 18 [2022-03-15 22:17:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:26,547 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1482 transitions. [2022-03-15 22:17:26,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:17:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1482 transitions. [2022-03-15 22:17:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:26,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:26,548 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:26,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 22:17:26,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:26,764 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash 903573229, now seen corresponding path program 101 times [2022-03-15 22:17:26,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:26,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256842823] [2022-03-15 22:17:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:26,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:26,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:26,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256842823] [2022-03-15 22:17:26,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256842823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:26,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480329739] [2022-03-15 22:17:26,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:17:26,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:26,926 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 22:17:26,926 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 22:17:26,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:17:26,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:26,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:17:26,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:17:27,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:27,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480329739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:27,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:27,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2022-03-15 22:17:27,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1827124620] [2022-03-15 22:17:27,229 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:27,230 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:27,232 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:17:27,232 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:27,365 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [97815#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1)))), 97816#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 97740#(< j2 M2), 97814#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (= M2 M1)))] [2022-03-15 22:17:27,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:17:27,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:27,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:17:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:17:27,366 INFO L87 Difference]: Start difference. First operand 538 states and 1482 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:17:27,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:27,627 INFO L93 Difference]: Finished difference Result 712 states and 1898 transitions. [2022-03-15 22:17:27,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:17:27,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:27,628 INFO L225 Difference]: With dead ends: 712 [2022-03-15 22:17:27,628 INFO L226 Difference]: Without dead ends: 711 [2022-03-15 22:17:27,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:17:27,629 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:27,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:17:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-03-15 22:17:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 537. [2022-03-15 22:17:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 2.7611940298507465) internal successors, (1480), 536 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1480 transitions. [2022-03-15 22:17:27,648 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1480 transitions. Word has length 18 [2022-03-15 22:17:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:27,648 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1480 transitions. [2022-03-15 22:17:27,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:17:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1480 transitions. [2022-03-15 22:17:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:27,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:27,648 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:27,665 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 22:17:27,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 22:17:27,863 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:27,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:27,864 INFO L85 PathProgramCache]: Analyzing trace with hash 62178658, now seen corresponding path program 102 times [2022-03-15 22:17:27,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:27,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509961588] [2022-03-15 22:17:27,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:27,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:28,081 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 22:17:28,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:28,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509961588] [2022-03-15 22:17:28,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509961588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:28,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398373975] [2022-03-15 22:17:28,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:17:28,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:28,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:28,083 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 22:17:28,083 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 22:17:28,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:17:28,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:28,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:17:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:28,420 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 22:17:28,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:28,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398373975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:28,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:28,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 30 [2022-03-15 22:17:28,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [775362512] [2022-03-15 22:17:28,636 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:28,653 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:28,655 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 42 transitions. [2022-03-15 22:17:28,655 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:29,138 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [99769#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 99766#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 99767#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 99768#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 99764#(or (< j2 M2) (< j1 M1) (= counter 0)), 99763#(or (< j1 M1) (= counter 0)), 99765#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2)))] [2022-03-15 22:17:29,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:17:29,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:29,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:17:29,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:17:29,139 INFO L87 Difference]: Start difference. First operand 537 states and 1480 transitions. Second operand has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:32,048 INFO L93 Difference]: Finished difference Result 900 states and 2222 transitions. [2022-03-15 22:17:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 22:17:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:32,049 INFO L225 Difference]: With dead ends: 900 [2022-03-15 22:17:32,049 INFO L226 Difference]: Without dead ends: 893 [2022-03-15 22:17:32,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1097, Invalid=8023, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 22:17:32,050 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 141 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:32,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 0 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:17:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-03-15 22:17:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 556. [2022-03-15 22:17:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.7693693693693695) internal successors, (1537), 555 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1537 transitions. [2022-03-15 22:17:32,057 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1537 transitions. Word has length 18 [2022-03-15 22:17:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:32,057 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 1537 transitions. [2022-03-15 22:17:32,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:32,071 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1537 transitions. [2022-03-15 22:17:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:32,072 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:32,072 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:32,092 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 22:17:32,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 22:17:32,288 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash -319683490, now seen corresponding path program 103 times [2022-03-15 22:17:32,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:32,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630546314] [2022-03-15 22:17:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:32,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:32,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:32,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630546314] [2022-03-15 22:17:32,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630546314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:32,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137644427] [2022-03-15 22:17:32,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:17:32,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:32,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:32,423 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 22:17:32,424 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 22:17:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:32,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:17:32,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:32,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:17:32,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137644427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:32,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:32,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 25 [2022-03-15 22:17:32,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1097394164] [2022-03-15 22:17:32,828 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:32,829 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:32,831 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 28 transitions. [2022-03-15 22:17:32,831 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:32,913 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [102025#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 101952#(< j2 M2), 102024#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:17:32,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:17:32,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:32,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:17:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:17:32,914 INFO L87 Difference]: Start difference. First operand 556 states and 1537 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 22:17:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:33,191 INFO L93 Difference]: Finished difference Result 811 states and 2148 transitions. [2022-03-15 22:17:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:17:33,191 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 18 [2022-03-15 22:17:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:33,192 INFO L225 Difference]: With dead ends: 811 [2022-03-15 22:17:33,192 INFO L226 Difference]: Without dead ends: 810 [2022-03-15 22:17:33,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:17:33,192 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:33,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:17:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-03-15 22:17:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 566. [2022-03-15 22:17:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.7716814159292036) internal successors, (1566), 565 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 22:17:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1566 transitions. [2022-03-15 22:17:33,199 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1566 transitions. Word has length 18 [2022-03-15 22:17:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:33,199 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 1566 transitions. [2022-03-15 22:17:33,199 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 22:17:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1566 transitions. [2022-03-15 22:17:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:33,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:33,200 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:33,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-15 22:17:33,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:33,406 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:33,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1734772701, now seen corresponding path program 104 times [2022-03-15 22:17:33,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:33,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649782296] [2022-03-15 22:17:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:33,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:33,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:33,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649782296] [2022-03-15 22:17:33,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649782296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:33,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200001483] [2022-03-15 22:17:33,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:17:33,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:33,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:33,646 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 22:17:33,647 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 22:17:33,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:17:33,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 22:17:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:33,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 22:17:34,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200001483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:34,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:34,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 7] total 27 [2022-03-15 22:17:34,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [255950791] [2022-03-15 22:17:34,072 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:34,077 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:34,079 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 42 transitions. [2022-03-15 22:17:34,079 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:34,473 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [104129#(or (< j1 M1) (<= (+ 2 j2) M2)), 104126#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 104127#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 104131#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 104130#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 104125#(< j1 M1), 104128#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:17:34,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:17:34,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:17:34,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:17:34,474 INFO L87 Difference]: Start difference. First operand 566 states and 1566 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:35,302 INFO L93 Difference]: Finished difference Result 676 states and 1790 transitions. [2022-03-15 22:17:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:17:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:35,303 INFO L225 Difference]: With dead ends: 676 [2022-03-15 22:17:35,303 INFO L226 Difference]: Without dead ends: 664 [2022-03-15 22:17:35,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=2273, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:17:35,304 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:35,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:17:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-15 22:17:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 564. [2022-03-15 22:17:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.761989342806394) internal successors, (1555), 563 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 22:17:35,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1555 transitions. [2022-03-15 22:17:35,310 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1555 transitions. Word has length 18 [2022-03-15 22:17:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:35,310 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 1555 transitions. [2022-03-15 22:17:35,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:35,310 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1555 transitions. [2022-03-15 22:17:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:35,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:35,310 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:35,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 22:17:35,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:35,511 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash 362794391, now seen corresponding path program 105 times [2022-03-15 22:17:35,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:35,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023004224] [2022-03-15 22:17:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:35,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:35,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:35,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023004224] [2022-03-15 22:17:35,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023004224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:35,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218791154] [2022-03-15 22:17:35,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:17:35,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:35,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:35,737 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 22:17:35,738 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 22:17:35,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:17:35,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:35,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:17:35,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:36,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:17:36,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218791154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:36,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:36,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 31 [2022-03-15 22:17:36,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [105757472] [2022-03-15 22:17:36,401 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:36,402 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:36,404 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2022-03-15 22:17:36,404 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:36,653 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [106106#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 106107#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 106105#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 106104#(or (< j1 M1) (<= (+ 2 j2) M2)), 106103#(or (< j1 M1) (<= (+ j2 1) M2)), 106102#(< j1 M1)] [2022-03-15 22:17:36,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:17:36,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:17:36,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:17:36,653 INFO L87 Difference]: Start difference. First operand 564 states and 1555 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 22:17:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:37,324 INFO L93 Difference]: Finished difference Result 676 states and 1788 transitions. [2022-03-15 22:17:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 22:17:37,325 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 18 [2022-03-15 22:17:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:37,326 INFO L225 Difference]: With dead ends: 676 [2022-03-15 22:17:37,326 INFO L226 Difference]: Without dead ends: 676 [2022-03-15 22:17:37,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=390, Invalid=2916, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 22:17:37,326 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:37,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:17:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-03-15 22:17:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 565. [2022-03-15 22:17:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 2.7641843971631204) internal successors, (1559), 564 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1559 transitions. [2022-03-15 22:17:37,332 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1559 transitions. Word has length 18 [2022-03-15 22:17:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:37,332 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 1559 transitions. [2022-03-15 22:17:37,332 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 22:17:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1559 transitions. [2022-03-15 22:17:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:37,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:37,333 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:37,349 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 22:17:37,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-15 22:17:37,537 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:37,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:37,538 INFO L85 PathProgramCache]: Analyzing trace with hash -309180386, now seen corresponding path program 106 times [2022-03-15 22:17:37,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:37,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026455428] [2022-03-15 22:17:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:37,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:37,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:37,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026455428] [2022-03-15 22:17:37,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026455428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:37,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649699160] [2022-03-15 22:17:37,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:17:37,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:37,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:37,698 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 22:17:37,699 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 22:17:37,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:17:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:37,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:17:37,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:37,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:17:38,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649699160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:38,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:38,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 23 [2022-03-15 22:17:38,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2101303420] [2022-03-15 22:17:38,055 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:38,056 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:38,057 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 28 transitions. [2022-03-15 22:17:38,057 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:38,187 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [108009#(< j2 M2), 108080#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 108081#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:17:38,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:17:38,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:38,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:17:38,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:17:38,187 INFO L87 Difference]: Start difference. First operand 565 states and 1559 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 22:17:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:38,431 INFO L93 Difference]: Finished difference Result 818 states and 2136 transitions. [2022-03-15 22:17:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:17:38,432 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 18 [2022-03-15 22:17:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:38,433 INFO L225 Difference]: With dead ends: 818 [2022-03-15 22:17:38,433 INFO L226 Difference]: Without dead ends: 817 [2022-03-15 22:17:38,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:17:38,433 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:38,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:17:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-03-15 22:17:38,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 571. [2022-03-15 22:17:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.763157894736842) internal successors, (1575), 570 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1575 transitions. [2022-03-15 22:17:38,440 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1575 transitions. Word has length 18 [2022-03-15 22:17:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:38,440 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 1575 transitions. [2022-03-15 22:17:38,440 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 22:17:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1575 transitions. [2022-03-15 22:17:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:38,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:38,441 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:38,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-15 22:17:38,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-15 22:17:38,656 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:38,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1954478499, now seen corresponding path program 107 times [2022-03-15 22:17:38,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:38,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428302001] [2022-03-15 22:17:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:38,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:38,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:38,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428302001] [2022-03-15 22:17:38,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428302001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:38,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081290232] [2022-03-15 22:17:38,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:17:38,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:38,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:38,875 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 22:17:38,878 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 22:17:38,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:17:38,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:38,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:17:38,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:39,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:17:39,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081290232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:39,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:39,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 27 [2022-03-15 22:17:39,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [383755403] [2022-03-15 22:17:39,246 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:39,247 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:39,249 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2022-03-15 22:17:39,249 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:39,438 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [110197#(< j1 M1), 110196#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 110198#(or (< j1 M1) (<= (+ j2 1) M2)), 110199#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 3 j2) M2)), 110200#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:17:39,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:17:39,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:17:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:17:39,438 INFO L87 Difference]: Start difference. First operand 571 states and 1575 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 22:17:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:40,236 INFO L93 Difference]: Finished difference Result 669 states and 1748 transitions. [2022-03-15 22:17:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 22:17:40,237 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 18 [2022-03-15 22:17:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:40,238 INFO L225 Difference]: With dead ends: 669 [2022-03-15 22:17:40,238 INFO L226 Difference]: Without dead ends: 669 [2022-03-15 22:17:40,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=2530, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:17:40,238 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:40,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:17:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-03-15 22:17:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 586. [2022-03-15 22:17:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.7623931623931623) internal successors, (1616), 585 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1616 transitions. [2022-03-15 22:17:40,244 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1616 transitions. Word has length 18 [2022-03-15 22:17:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:40,244 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1616 transitions. [2022-03-15 22:17:40,244 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 22:17:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1616 transitions. [2022-03-15 22:17:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:40,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:40,245 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:40,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-15 22:17:40,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:40,461 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash -429723848, now seen corresponding path program 108 times [2022-03-15 22:17:40,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:40,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837091653] [2022-03-15 22:17:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:40,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:40,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:40,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837091653] [2022-03-15 22:17:40,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837091653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:40,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628154886] [2022-03-15 22:17:40,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:17:40,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:40,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:40,631 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 22:17:40,632 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 22:17:40,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:17:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:40,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 22:17:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:41,373 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 22:17:41,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:42,228 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 22:17:42,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628154886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:42,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:42,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 34 [2022-03-15 22:17:42,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1289227459] [2022-03-15 22:17:42,229 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:42,230 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:42,232 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:17:42,232 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:42,411 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [112221#(< j1 M1), 112222#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 112223#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 112224#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:17:42,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:17:42,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:17:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:17:42,412 INFO L87 Difference]: Start difference. First operand 586 states and 1616 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:17:43,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:43,334 INFO L93 Difference]: Finished difference Result 1116 states and 2922 transitions. [2022-03-15 22:17:43,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:17:43,334 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:43,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:43,336 INFO L225 Difference]: With dead ends: 1116 [2022-03-15 22:17:43,336 INFO L226 Difference]: Without dead ends: 1116 [2022-03-15 22:17:43,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=700, Invalid=2606, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 22:17:43,336 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:43,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:17:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-15 22:17:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 785. [2022-03-15 22:17:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.832908163265306) internal successors, (2221), 784 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2221 transitions. [2022-03-15 22:17:43,346 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2221 transitions. Word has length 18 [2022-03-15 22:17:43,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:43,346 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2221 transitions. [2022-03-15 22:17:43,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:17:43,346 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2221 transitions. [2022-03-15 22:17:43,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:43,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:43,347 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:43,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-15 22:17:43,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:43,560 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:43,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1313086487, now seen corresponding path program 109 times [2022-03-15 22:17:43,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:43,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356115934] [2022-03-15 22:17:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:43,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:43,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:43,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356115934] [2022-03-15 22:17:43,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356115934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:43,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563890543] [2022-03-15 22:17:43,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:17:43,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:43,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:43,837 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 22:17:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:43,873 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 22:17:43,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:17:43,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:44,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:44,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563890543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:44,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:44,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 30 [2022-03-15 22:17:44,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1443541214] [2022-03-15 22:17:44,715 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:44,716 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:44,717 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:17:44,718 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:44,928 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [115083#(or (< j1 M1) (= counter 0)), 115086#(or (< j2 M2) (< j1 M1) (= counter 0)), 115085#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 115084#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:17:44,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:17:44,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:17:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:17:44,929 INFO L87 Difference]: Start difference. First operand 785 states and 2221 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 22:17:45,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:45,506 INFO L93 Difference]: Finished difference Result 891 states and 2405 transitions. [2022-03-15 22:17:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:17:45,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:45,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:45,508 INFO L225 Difference]: With dead ends: 891 [2022-03-15 22:17:45,508 INFO L226 Difference]: Without dead ends: 875 [2022-03-15 22:17:45,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:17:45,508 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:45,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:17:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-03-15 22:17:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 779. [2022-03-15 22:17:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 2.834190231362468) internal successors, (2205), 778 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2205 transitions. [2022-03-15 22:17:45,540 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2205 transitions. Word has length 18 [2022-03-15 22:17:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:45,540 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 2205 transitions. [2022-03-15 22:17:45,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 22:17:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2205 transitions. [2022-03-15 22:17:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:45,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:45,541 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:45,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-15 22:17:45,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-03-15 22:17:45,741 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:45,742 INFO L85 PathProgramCache]: Analyzing trace with hash 191261377, now seen corresponding path program 110 times [2022-03-15 22:17:45,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:45,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351138935] [2022-03-15 22:17:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:45,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:45,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:45,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351138935] [2022-03-15 22:17:45,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351138935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:45,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466663356] [2022-03-15 22:17:45,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:17:45,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:45,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:45,984 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 22:17:45,985 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 22:17:46,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:17:46,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:46,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 22:17:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:46,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:17:46,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466663356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:46,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:46,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 28 [2022-03-15 22:17:46,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [491884604] [2022-03-15 22:17:46,737 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:46,738 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:46,740 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 42 transitions. [2022-03-15 22:17:46,740 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:47,150 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [117697#(< j1 M1), 117701#(or (< j1 M1) (<= (+ 2 j2) M2)), 117702#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 117698#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 117700#(or (< j1 M1) (<= (+ j2 1) M2)), 117699#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 117703#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2)))] [2022-03-15 22:17:47,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:17:47,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:17:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:17:47,150 INFO L87 Difference]: Start difference. First operand 779 states and 2205 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:47,916 INFO L93 Difference]: Finished difference Result 898 states and 2456 transitions. [2022-03-15 22:17:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:17:47,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:47,917 INFO L225 Difference]: With dead ends: 898 [2022-03-15 22:17:47,917 INFO L226 Difference]: Without dead ends: 886 [2022-03-15 22:17:47,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:17:47,917 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:47,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:17:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-03-15 22:17:47,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 780. [2022-03-15 22:17:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.8254172015404366) internal successors, (2201), 779 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2201 transitions. [2022-03-15 22:17:47,926 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2201 transitions. Word has length 18 [2022-03-15 22:17:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:47,926 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2201 transitions. [2022-03-15 22:17:47,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2201 transitions. [2022-03-15 22:17:47,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:47,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:47,927 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:47,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-15 22:17:48,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-15 22:17:48,142 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1809625322, now seen corresponding path program 111 times [2022-03-15 22:17:48,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:48,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854865579] [2022-03-15 22:17:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:48,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:48,366 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 22:17:48,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:48,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854865579] [2022-03-15 22:17:48,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854865579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:48,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738995541] [2022-03-15 22:17:48,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:17:48,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:48,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:48,367 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 22:17:48,368 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 22:17:48,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:17:48,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:48,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:17:48,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:48,726 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 22:17:48,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:49,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738995541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:49,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:49,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-03-15 22:17:49,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1641823612] [2022-03-15 22:17:49,047 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:49,048 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:49,063 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2022-03-15 22:17:49,063 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:49,539 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [120331#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 120327#(or (< j1 M1) (= counter 0)), 120332#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 120329#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 120330#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2))), 120328#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:17:49,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:17:49,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:49,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:17:49,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:17:49,540 INFO L87 Difference]: Start difference. First operand 780 states and 2201 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) 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 22:17:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:51,607 INFO L93 Difference]: Finished difference Result 1126 states and 2893 transitions. [2022-03-15 22:17:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 22:17:51,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) 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 18 [2022-03-15 22:17:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:51,609 INFO L225 Difference]: With dead ends: 1126 [2022-03-15 22:17:51,609 INFO L226 Difference]: Without dead ends: 1116 [2022-03-15 22:17:51,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=769, Invalid=5393, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 22:17:51,609 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:51,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:17:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-15 22:17:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 801. [2022-03-15 22:17:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 2.83) internal successors, (2264), 800 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:51,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2264 transitions. [2022-03-15 22:17:51,620 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2264 transitions. Word has length 18 [2022-03-15 22:17:51,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:51,620 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2264 transitions. [2022-03-15 22:17:51,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) 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 22:17:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2264 transitions. [2022-03-15 22:17:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:51,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:51,621 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:51,637 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 22:17:51,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 22:17:51,837 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:51,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:51,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2006138827, now seen corresponding path program 112 times [2022-03-15 22:17:51,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:51,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440554882] [2022-03-15 22:17:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:51,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:52,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:52,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440554882] [2022-03-15 22:17:52,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440554882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:52,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482502958] [2022-03-15 22:17:52,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:17:52,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:52,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:52,029 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 22:17:52,029 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 22:17:52,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:17:52,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:17:52,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:52,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:17:52,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482502958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:52,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:52,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 28 [2022-03-15 22:17:52,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [849940707] [2022-03-15 22:17:52,587 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:52,588 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:52,590 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2022-03-15 22:17:52,590 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:52,974 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [123274#(or (< j1 M1) (<= (+ 2 j2) M2)), 123277#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 123273#(or (< j1 M1) (<= (+ j2 1) M2)), 123275#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 123276#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 123272#(< j1 M1)] [2022-03-15 22:17:52,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:17:52,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:17:52,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:17:52,975 INFO L87 Difference]: Start difference. First operand 801 states and 2264 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 22:17:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:53,735 INFO L93 Difference]: Finished difference Result 922 states and 2520 transitions. [2022-03-15 22:17:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 22:17:53,735 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 18 [2022-03-15 22:17:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:53,737 INFO L225 Difference]: With dead ends: 922 [2022-03-15 22:17:53,737 INFO L226 Difference]: Without dead ends: 921 [2022-03-15 22:17:53,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=337, Invalid=2525, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:17:53,737 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:53,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:17:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-03-15 22:17:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 801. [2022-03-15 22:17:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 2.82875) internal successors, (2263), 800 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 22:17:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2263 transitions. [2022-03-15 22:17:53,746 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2263 transitions. Word has length 18 [2022-03-15 22:17:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:53,747 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2263 transitions. [2022-03-15 22:17:53,747 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 22:17:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2263 transitions. [2022-03-15 22:17:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:53,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:53,747 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:53,780 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 22:17:53,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-15 22:17:53,962 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:53,962 INFO L85 PathProgramCache]: Analyzing trace with hash -414454719, now seen corresponding path program 113 times [2022-03-15 22:17:53,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:53,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473877547] [2022-03-15 22:17:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:53,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:54,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:54,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473877547] [2022-03-15 22:17:54,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473877547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:54,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163444779] [2022-03-15 22:17:54,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:17:54,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:54,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:54,128 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 22:17:54,129 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 22:17:54,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:17:54,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:54,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:17:54,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:54,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:17:54,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163444779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:54,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:54,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 32 [2022-03-15 22:17:54,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [620574979] [2022-03-15 22:17:54,743 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:54,744 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:54,746 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2022-03-15 22:17:54,746 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:54,942 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [125978#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 125976#(< j1 M1), 125975#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 125979#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 125977#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:17:54,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:17:54,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:54,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:17:54,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:17:54,943 INFO L87 Difference]: Start difference. First operand 801 states and 2263 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 22:17:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:55,863 INFO L93 Difference]: Finished difference Result 941 states and 2557 transitions. [2022-03-15 22:17:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:17:55,863 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 18 [2022-03-15 22:17:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:55,865 INFO L225 Difference]: With dead ends: 941 [2022-03-15 22:17:55,865 INFO L226 Difference]: Without dead ends: 941 [2022-03-15 22:17:55,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=506, Invalid=3526, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 22:17:55,865 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:55,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:17:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-15 22:17:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 803. [2022-03-15 22:17:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 2.8291770573566084) internal successors, (2269), 802 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2269 transitions. [2022-03-15 22:17:55,874 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2269 transitions. Word has length 18 [2022-03-15 22:17:55,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:55,874 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 2269 transitions. [2022-03-15 22:17:55,874 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 22:17:55,874 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2269 transitions. [2022-03-15 22:17:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:55,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:55,875 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:55,891 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 22:17:56,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:56,082 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1496310230, now seen corresponding path program 114 times [2022-03-15 22:17:56,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:56,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925660202] [2022-03-15 22:17:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:56,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:56,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:56,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925660202] [2022-03-15 22:17:56,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925660202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:56,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086784862] [2022-03-15 22:17:56,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:17:56,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:56,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:56,277 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 22:17:56,278 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 22:17:56,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:17:56,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:17:56,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:17:56,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:56,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:57,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086784862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:57,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:57,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-03-15 22:17:57,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2069320652] [2022-03-15 22:17:57,292 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:57,293 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:57,295 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:17:57,295 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:57,429 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [128716#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 128717#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 128715#(< j1 M1), 128718#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:17:57,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:17:57,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:57,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:17:57,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:17:57,430 INFO L87 Difference]: Start difference. First operand 803 states and 2269 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:17:57,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:17:57,954 INFO L93 Difference]: Finished difference Result 1123 states and 2946 transitions. [2022-03-15 22:17:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:17:57,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:17:57,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:17:57,955 INFO L225 Difference]: With dead ends: 1123 [2022-03-15 22:17:57,955 INFO L226 Difference]: Without dead ends: 1123 [2022-03-15 22:17:57,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=581, Invalid=2281, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:17:57,956 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:17:57,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:17:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-03-15 22:17:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 816. [2022-03-15 22:17:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 2.8368098159509203) internal successors, (2312), 815 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:17:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2312 transitions. [2022-03-15 22:17:57,966 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2312 transitions. Word has length 18 [2022-03-15 22:17:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:17:57,966 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 2312 transitions. [2022-03-15 22:17:57,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:17:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2312 transitions. [2022-03-15 22:17:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:17:57,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:17:57,967 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:17:57,985 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 22:17:58,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:58,181 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:17:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:17:58,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1055846731, now seen corresponding path program 115 times [2022-03-15 22:17:58,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:17:58,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508377359] [2022-03-15 22:17:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:17:58,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:17:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:58,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:17:58,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508377359] [2022-03-15 22:17:58,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508377359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:17:58,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753483531] [2022-03-15 22:17:58,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:17:58,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:17:58,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:17:58,432 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 22:17:58,432 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 22:17:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:17:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:17:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:17:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:17:58,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:17:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:17:59,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753483531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:17:59,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:17:59,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 30 [2022-03-15 22:17:59,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1851939632] [2022-03-15 22:17:59,558 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:17:59,563 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:17:59,565 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:17:59,565 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:17:59,780 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [131640#(or (< j1 M1) (= counter 0)), 131641#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 131643#(or (< j2 M2) (< j1 M1) (= counter 0)), 131642#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:17:59,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:17:59,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:17:59,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:17:59,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:17:59,781 INFO L87 Difference]: Start difference. First operand 816 states and 2312 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 22:18:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:00,723 INFO L93 Difference]: Finished difference Result 893 states and 2441 transitions. [2022-03-15 22:18:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:18:00,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:18:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:00,724 INFO L225 Difference]: With dead ends: 893 [2022-03-15 22:18:00,724 INFO L226 Difference]: Without dead ends: 887 [2022-03-15 22:18:00,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=384, Invalid=2372, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:18:00,725 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:00,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-03-15 22:18:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 818. [2022-03-15 22:18:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 2.8384332925336597) internal successors, (2319), 817 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2319 transitions. [2022-03-15 22:18:00,735 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2319 transitions. Word has length 18 [2022-03-15 22:18:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:00,735 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 2319 transitions. [2022-03-15 22:18:00,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 22:18:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2319 transitions. [2022-03-15 22:18:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:00,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:00,736 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:00,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-15 22:18:00,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-15 22:18:00,952 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:00,953 INFO L85 PathProgramCache]: Analyzing trace with hash -190600771, now seen corresponding path program 116 times [2022-03-15 22:18:00,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:00,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612158454] [2022-03-15 22:18:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:00,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:01,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:01,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612158454] [2022-03-15 22:18:01,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612158454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:01,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034495109] [2022-03-15 22:18:01,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:18:01,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:01,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:01,156 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 22:18:01,156 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 22:18:01,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:18:01,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:01,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:18:01,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:18:01,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:18:01,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034495109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:01,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:01,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2022-03-15 22:18:01,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [545845086] [2022-03-15 22:18:01,543 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:01,543 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:01,545 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 28 transitions. [2022-03-15 22:18:01,545 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:01,676 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [134263#(< j2 M2), 134336#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 134337#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:18:01,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:18:01,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:01,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:18:01,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2022-03-15 22:18:01,676 INFO L87 Difference]: Start difference. First operand 818 states and 2319 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:18:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:02,141 INFO L93 Difference]: Finished difference Result 1042 states and 2854 transitions. [2022-03-15 22:18:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:18:02,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:18:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:02,143 INFO L225 Difference]: With dead ends: 1042 [2022-03-15 22:18:02,143 INFO L226 Difference]: Without dead ends: 1041 [2022-03-15 22:18:02,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:18:02,143 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:02,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-03-15 22:18:02,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 818. [2022-03-15 22:18:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 2.8372093023255816) internal successors, (2318), 817 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2318 transitions. [2022-03-15 22:18:02,153 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2318 transitions. Word has length 18 [2022-03-15 22:18:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:02,153 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 2318 transitions. [2022-03-15 22:18:02,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:18:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2318 transitions. [2022-03-15 22:18:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:02,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:02,154 INFO L514 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:02,172 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 22:18:02,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:02,354 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:02,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1605689982, now seen corresponding path program 117 times [2022-03-15 22:18:02,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:02,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757052197] [2022-03-15 22:18:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:02,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:02,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:02,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757052197] [2022-03-15 22:18:02,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757052197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:02,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796474317] [2022-03-15 22:18:02,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:18:02,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:02,672 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 22:18:02,672 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 22:18:02,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:18:02,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:02,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:18:02,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:18:02,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:03,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796474317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:03,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:03,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 31 [2022-03-15 22:18:03,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [457187867] [2022-03-15 22:18:03,356 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:03,357 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:03,359 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 42 transitions. [2022-03-15 22:18:03,359 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:04,110 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [137182#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 0 j1)) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (<= j1 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1)))), 137183#(or (< j1 M1) (<= (+ j2 1) M2)), 137185#(or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))), 137181#(and (or (<= j1 1) (not (< j1 M1))) (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (= M2 M1)) (or (not (< j1 M1)) (<= 1 j1)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 137180#(< j1 M1), 137186#(and (or (< j1 M1) (<= j2 2) (<= C 0) (<= M2 3)) (or (< j1 M1) (<= C 0) (< 1 j2)) (or (<= counter 0) (< j1 M1) (<= C 0) (<= M2 3)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2) (<= M2 3)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2))) (or (< j1 M1) (<= 3 M2) (<= (+ 2 j2) M2) (< 0 counter) (< 2 j2))), 137184#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:18:04,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:18:04,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:18:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1239, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:18:04,110 INFO L87 Difference]: Start difference. First operand 818 states and 2318 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:06,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:06,030 INFO L93 Difference]: Finished difference Result 898 states and 2462 transitions. [2022-03-15 22:18:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:18:06,031 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:18:06,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:06,032 INFO L225 Difference]: With dead ends: 898 [2022-03-15 22:18:06,032 INFO L226 Difference]: Without dead ends: 888 [2022-03-15 22:18:06,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=516, Invalid=3266, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 22:18:06,032 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:06,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:18:06,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-03-15 22:18:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 818. [2022-03-15 22:18:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 2.8335373317013466) internal successors, (2315), 817 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 22:18:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2315 transitions. [2022-03-15 22:18:06,041 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2315 transitions. Word has length 18 [2022-03-15 22:18:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:06,041 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 2315 transitions. [2022-03-15 22:18:06,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2315 transitions. [2022-03-15 22:18:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:06,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:06,042 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:06,060 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 22:18:06,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:06,258 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash 688390615, now seen corresponding path program 118 times [2022-03-15 22:18:06,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:06,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568067134] [2022-03-15 22:18:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:06,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:06,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:06,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568067134] [2022-03-15 22:18:06,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568067134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:06,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566051922] [2022-03-15 22:18:06,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:18:06,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:06,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:06,490 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 22:18:06,490 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 22:18:06,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:18:06,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:06,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:18:06,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:06,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:07,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566051922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:07,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:07,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 28 [2022-03-15 22:18:07,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [155645876] [2022-03-15 22:18:07,098 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:07,098 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:07,101 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2022-03-15 22:18:07,101 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:07,483 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [139901#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 139903#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 139899#(< j1 M1), 139900#(or (< j1 M1) (<= (+ j2 1) M2)), 139902#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 139904#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:18:07,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:18:07,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:18:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:18:07,484 INFO L87 Difference]: Start difference. First operand 818 states and 2315 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 22:18:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:09,651 INFO L93 Difference]: Finished difference Result 1139 states and 2991 transitions. [2022-03-15 22:18:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 22:18:09,651 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 18 [2022-03-15 22:18:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:09,652 INFO L225 Difference]: With dead ends: 1139 [2022-03-15 22:18:09,652 INFO L226 Difference]: Without dead ends: 1138 [2022-03-15 22:18:09,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=867, Invalid=6615, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 22:18:09,653 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 161 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:09,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 0 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:18:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-03-15 22:18:09,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 862. [2022-03-15 22:18:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.8339140534262484) internal successors, (2440), 861 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2440 transitions. [2022-03-15 22:18:09,663 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2440 transitions. Word has length 18 [2022-03-15 22:18:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:09,663 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2440 transitions. [2022-03-15 22:18:09,663 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 22:18:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2440 transitions. [2022-03-15 22:18:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:09,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:09,664 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:09,680 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 22:18:09,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-15 22:18:09,879 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:09,880 INFO L85 PathProgramCache]: Analyzing trace with hash -207438110, now seen corresponding path program 119 times [2022-03-15 22:18:09,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:09,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769021234] [2022-03-15 22:18:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:10,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:10,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769021234] [2022-03-15 22:18:10,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769021234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:10,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784370097] [2022-03-15 22:18:10,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:18:10,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:10,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:10,007 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 22:18:10,008 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 22:18:10,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:18:10,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:18:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:10,731 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 22:18:10,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:11,558 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 22:18:11,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784370097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:11,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:11,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 33 [2022-03-15 22:18:11,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1625006786] [2022-03-15 22:18:11,559 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:11,559 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:11,561 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2022-03-15 22:18:11,561 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:11,801 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [143009#(< j1 M1), 143011#(or (< j1 M1) (<= (+ 2 j2) M2)), 143010#(or (< j1 M1) (<= (+ j2 1) M2)), 143012#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 143008#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:18:11,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:18:11,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:11,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:18:11,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:18:11,802 INFO L87 Difference]: Start difference. First operand 862 states and 2440 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 22:18:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:12,528 INFO L93 Difference]: Finished difference Result 1134 states and 2981 transitions. [2022-03-15 22:18:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:18:12,528 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 18 [2022-03-15 22:18:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:12,529 INFO L225 Difference]: With dead ends: 1134 [2022-03-15 22:18:12,529 INFO L226 Difference]: Without dead ends: 1134 [2022-03-15 22:18:12,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 22:18:12,530 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:12,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:18:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-03-15 22:18:12,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 874. [2022-03-15 22:18:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 2.8339060710194732) internal successors, (2474), 873 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2474 transitions. [2022-03-15 22:18:12,540 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2474 transitions. Word has length 18 [2022-03-15 22:18:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:12,540 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 2474 transitions. [2022-03-15 22:18:12,540 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 22:18:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2474 transitions. [2022-03-15 22:18:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:12,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:12,541 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:12,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:12,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:12,756 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1638682711, now seen corresponding path program 120 times [2022-03-15 22:18:12,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:12,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809155098] [2022-03-15 22:18:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:12,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:12,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:12,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809155098] [2022-03-15 22:18:12,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809155098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:12,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756230323] [2022-03-15 22:18:12,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:18:12,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:12,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:12,946 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 22:18:12,947 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 22:18:12,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:18:12,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:18:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:13,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:13,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756230323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:13,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:13,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 11] total 29 [2022-03-15 22:18:13,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [113507934] [2022-03-15 22:18:13,888 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:13,889 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:13,891 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:18:13,891 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:14,143 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [146064#(or (< j1 M1) (= counter 0)), 146065#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 146066#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 146067#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:18:14,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:18:14,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:14,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:18:14,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:18:14,144 INFO L87 Difference]: Start difference. First operand 874 states and 2474 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 22:18:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:15,638 INFO L93 Difference]: Finished difference Result 1104 states and 2909 transitions. [2022-03-15 22:18:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:18:15,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:18:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:15,639 INFO L225 Difference]: With dead ends: 1104 [2022-03-15 22:18:15,640 INFO L226 Difference]: Without dead ends: 1090 [2022-03-15 22:18:15,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=531, Invalid=3251, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 22:18:15,640 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:15,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-03-15 22:18:15,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 877. [2022-03-15 22:18:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 2.835616438356164) internal successors, (2484), 876 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2484 transitions. [2022-03-15 22:18:15,650 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2484 transitions. Word has length 18 [2022-03-15 22:18:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:15,650 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 2484 transitions. [2022-03-15 22:18:15,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 22:18:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2484 transitions. [2022-03-15 22:18:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:15,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:15,651 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:15,667 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 22:18:15,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:15,867 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:15,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1791038625, now seen corresponding path program 121 times [2022-03-15 22:18:15,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:15,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403661179] [2022-03-15 22:18:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:15,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:16,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:16,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403661179] [2022-03-15 22:18:16,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403661179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:16,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593242220] [2022-03-15 22:18:16,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:18:16,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:16,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:16,044 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 22:18:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:16,080 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 22:18:16,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:18:16,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:16,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:18:16,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593242220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:16,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:16,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2022-03-15 22:18:16,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2083984610] [2022-03-15 22:18:16,599 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:16,600 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:16,602 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 28 transitions. [2022-03-15 22:18:16,602 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:16,702 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [149111#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 149037#(< j2 M2), 149110#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:18:16,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:18:16,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:16,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:18:16,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:18:16,702 INFO L87 Difference]: Start difference. First operand 877 states and 2484 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:18:17,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:17,175 INFO L93 Difference]: Finished difference Result 1421 states and 3846 transitions. [2022-03-15 22:18:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:18:17,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:18:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:17,177 INFO L225 Difference]: With dead ends: 1421 [2022-03-15 22:18:17,177 INFO L226 Difference]: Without dead ends: 1370 [2022-03-15 22:18:17,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1903, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:18:17,178 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:17,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2022-03-15 22:18:17,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 854. [2022-03-15 22:18:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.8053927315357563) internal successors, (2393), 853 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2393 transitions. [2022-03-15 22:18:17,189 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2393 transitions. Word has length 18 [2022-03-15 22:18:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:17,189 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 2393 transitions. [2022-03-15 22:18:17,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:18:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2393 transitions. [2022-03-15 22:18:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:17,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:17,190 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:17,206 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 22:18:17,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 22:18:17,406 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash -403951615, now seen corresponding path program 122 times [2022-03-15 22:18:17,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:17,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303968436] [2022-03-15 22:18:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:17,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:17,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:17,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303968436] [2022-03-15 22:18:17,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303968436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:17,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735248319] [2022-03-15 22:18:17,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:18:17,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:17,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:17,569 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 22:18:17,570 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 22:18:17,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:18:17,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:17,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:18:17,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:17,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:18,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735248319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:18,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:18,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 30 [2022-03-15 22:18:18,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1869291389] [2022-03-15 22:18:18,293 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:18,293 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:18,295 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2022-03-15 22:18:18,295 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:18,553 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [152416#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 152413#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 152415#(or (< j2 M2) (< j1 M1) (= counter 0)), 152414#(or (< j1 M1) (= counter 0)), 152417#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:18:18,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:18:18,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:18:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:18:18,554 INFO L87 Difference]: Start difference. First operand 854 states and 2393 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) 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 22:18:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:20,412 INFO L93 Difference]: Finished difference Result 1066 states and 2806 transitions. [2022-03-15 22:18:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 22:18:20,412 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) 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 18 [2022-03-15 22:18:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:20,414 INFO L225 Difference]: With dead ends: 1066 [2022-03-15 22:18:20,414 INFO L226 Difference]: Without dead ends: 1059 [2022-03-15 22:18:20,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=571, Invalid=3851, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 22:18:20,414 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:20,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-03-15 22:18:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 845. [2022-03-15 22:18:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.81042654028436) internal successors, (2372), 844 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2372 transitions. [2022-03-15 22:18:20,423 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2372 transitions. Word has length 18 [2022-03-15 22:18:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:20,423 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2372 transitions. [2022-03-15 22:18:20,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) 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 22:18:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2372 transitions. [2022-03-15 22:18:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:20,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:20,424 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:20,442 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 22:18:20,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:20,640 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash -300641129, now seen corresponding path program 123 times [2022-03-15 22:18:20,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:20,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17109140] [2022-03-15 22:18:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:20,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:20,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17109140] [2022-03-15 22:18:20,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17109140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:20,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685204804] [2022-03-15 22:18:20,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:18:20,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:20,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:20,816 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 22:18:20,817 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 22:18:20,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:18:20,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 22:18:20,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:18:21,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:22,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685204804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:22,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:22,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 12] total 31 [2022-03-15 22:18:22,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1389692485] [2022-03-15 22:18:22,267 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:22,267 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:22,277 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:18:22,277 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:22,403 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [155370#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 155368#(< j1 M1), 155371#(or (< j1 M1) (<= (+ j2 1) M2)), 155369#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:18:22,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:18:22,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:22,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:18:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:18:22,404 INFO L87 Difference]: Start difference. First operand 845 states and 2372 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 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 22:18:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:22,860 INFO L93 Difference]: Finished difference Result 1028 states and 2693 transitions. [2022-03-15 22:18:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:18:22,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:18:22,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:22,861 INFO L225 Difference]: With dead ends: 1028 [2022-03-15 22:18:22,861 INFO L226 Difference]: Without dead ends: 1024 [2022-03-15 22:18:22,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=554, Invalid=1996, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:18:22,862 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:22,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:18:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-03-15 22:18:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 848. [2022-03-15 22:18:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 2.820543093270366) internal successors, (2389), 847 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2389 transitions. [2022-03-15 22:18:22,876 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2389 transitions. Word has length 18 [2022-03-15 22:18:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:22,876 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 2389 transitions. [2022-03-15 22:18:22,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 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 22:18:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2389 transitions. [2022-03-15 22:18:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:22,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:22,878 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:22,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:23,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 22:18:23,094 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:23,095 INFO L85 PathProgramCache]: Analyzing trace with hash 925008752, now seen corresponding path program 124 times [2022-03-15 22:18:23,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:23,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417888116] [2022-03-15 22:18:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:23,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:23,352 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 22:18:23,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:23,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417888116] [2022-03-15 22:18:23,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417888116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:23,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926025954] [2022-03-15 22:18:23,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:18:23,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:23,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:23,354 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 22:18:23,355 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 22:18:23,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:18:23,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:18:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:23,687 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 22:18:23,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:24,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926025954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:24,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:24,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2022-03-15 22:18:24,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [518900547] [2022-03-15 22:18:24,040 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:24,042 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:24,050 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2022-03-15 22:18:24,050 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:24,523 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [158266#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 158265#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2))), 158264#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 158267#(and (or (< j1 M1) (= (* 3 C) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ 2 C) counter) (<= (+ j2 4) M2))), 158262#(or (< j1 M1) (= counter 0)), 158263#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:18:24,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:18:24,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:24,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:18:24,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:18:24,524 INFO L87 Difference]: Start difference. First operand 848 states and 2389 transitions. Second operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:26,708 INFO L93 Difference]: Finished difference Result 1285 states and 3469 transitions. [2022-03-15 22:18:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 22:18:26,709 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 22:18:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:26,711 INFO L225 Difference]: With dead ends: 1285 [2022-03-15 22:18:26,711 INFO L226 Difference]: Without dead ends: 1277 [2022-03-15 22:18:26,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=731, Invalid=5275, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 22:18:26,711 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 148 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:26,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 0 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:18:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-03-15 22:18:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 955. [2022-03-15 22:18:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 2.842767295597484) internal successors, (2712), 954 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2712 transitions. [2022-03-15 22:18:26,722 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2712 transitions. Word has length 18 [2022-03-15 22:18:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:26,723 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 2712 transitions. [2022-03-15 22:18:26,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2712 transitions. [2022-03-15 22:18:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:26,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:26,733 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:26,749 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 22:18:26,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-15 22:18:26,949 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash 543146604, now seen corresponding path program 125 times [2022-03-15 22:18:26,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:26,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504570862] [2022-03-15 22:18:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:26,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:27,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:27,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504570862] [2022-03-15 22:18:27,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504570862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:27,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929195935] [2022-03-15 22:18:27,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:18:27,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:27,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:27,153 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 22:18:27,154 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 22:18:27,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:18:27,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:27,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:18:27,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:27,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:27,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929195935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:27,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:27,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-15 22:18:27,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1683995640] [2022-03-15 22:18:27,551 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:27,552 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:27,553 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2022-03-15 22:18:27,553 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:27,602 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [161594#(< j2 M2), 161667#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:18:27,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:18:27,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:27,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:18:27,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:18:27,603 INFO L87 Difference]: Start difference. First operand 955 states and 2712 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 22:18:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:27,973 INFO L93 Difference]: Finished difference Result 1268 states and 3406 transitions. [2022-03-15 22:18:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:18:27,973 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 18 [2022-03-15 22:18:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:27,974 INFO L225 Difference]: With dead ends: 1268 [2022-03-15 22:18:27,975 INFO L226 Difference]: Without dead ends: 1267 [2022-03-15 22:18:27,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:18:27,975 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:27,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:18:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-15 22:18:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 978. [2022-03-15 22:18:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.8536335721596724) internal successors, (2788), 977 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2788 transitions. [2022-03-15 22:18:27,986 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2788 transitions. Word has length 18 [2022-03-15 22:18:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:27,987 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 2788 transitions. [2022-03-15 22:18:27,987 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 22:18:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2788 transitions. [2022-03-15 22:18:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:27,988 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:27,988 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:28,003 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 22:18:28,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-15 22:18:28,203 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:28,204 INFO L85 PathProgramCache]: Analyzing trace with hash -871942607, now seen corresponding path program 126 times [2022-03-15 22:18:28,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:28,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774247512] [2022-03-15 22:18:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:28,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:28,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:28,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774247512] [2022-03-15 22:18:28,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774247512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:28,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145639801] [2022-03-15 22:18:28,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:18:28,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:28,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:28,411 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 22:18:28,413 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 22:18:28,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:18:28,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:28,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:18:28,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:28,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:18:29,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145639801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:29,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:29,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 28 [2022-03-15 22:18:29,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2046086848] [2022-03-15 22:18:29,089 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:29,090 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:29,094 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2022-03-15 22:18:29,094 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:29,368 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [165063#(or (< j1 M1) (<= (+ j2 1) M2)), 165064#(or (< j1 M1) (<= (+ 2 j2) M2)), 165065#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 165066#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 165061#(< j1 M1), 165062#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:18:29,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:18:29,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:18:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:18:29,371 INFO L87 Difference]: Start difference. First operand 978 states and 2788 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 22:18:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:29,748 INFO L93 Difference]: Finished difference Result 1013 states and 2863 transitions. [2022-03-15 22:18:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:18:29,749 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 18 [2022-03-15 22:18:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:29,750 INFO L225 Difference]: With dead ends: 1013 [2022-03-15 22:18:29,751 INFO L226 Difference]: Without dead ends: 1003 [2022-03-15 22:18:29,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:18:29,752 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:29,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-03-15 22:18:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 978. [2022-03-15 22:18:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.8505629477993857) internal successors, (2785), 977 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2785 transitions. [2022-03-15 22:18:29,765 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2785 transitions. Word has length 18 [2022-03-15 22:18:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:29,766 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 2785 transitions. [2022-03-15 22:18:29,766 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 22:18:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2785 transitions. [2022-03-15 22:18:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:29,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:29,767 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:29,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:29,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:29,968 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1225624485, now seen corresponding path program 127 times [2022-03-15 22:18:29,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:29,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886063907] [2022-03-15 22:18:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:30,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:30,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886063907] [2022-03-15 22:18:30,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886063907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:30,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841759521] [2022-03-15 22:18:30,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:18:30,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:30,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:30,202 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 22:18:30,206 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 22:18:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:18:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:30,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:30,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841759521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:30,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:30,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 28 [2022-03-15 22:18:30,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1415746141] [2022-03-15 22:18:30,681 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:30,682 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:30,684 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 36 transitions. [2022-03-15 22:18:30,684 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:30,946 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [168186#(or (< j1 M1) (<= (+ 2 j2) M2)), 168185#(or (< j1 M1) (<= (+ j2 1) M2)), 168183#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 168184#(< j1 M1), 168187#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2))] [2022-03-15 22:18:30,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:18:30,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:30,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:18:30,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:18:30,946 INFO L87 Difference]: Start difference. First operand 978 states and 2785 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 22:18:31,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:31,396 INFO L93 Difference]: Finished difference Result 1007 states and 2847 transitions. [2022-03-15 22:18:31,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:18:31,397 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 22:18:31,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:31,398 INFO L225 Difference]: With dead ends: 1007 [2022-03-15 22:18:31,398 INFO L226 Difference]: Without dead ends: 1007 [2022-03-15 22:18:31,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:18:31,399 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:31,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-03-15 22:18:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 978. [2022-03-15 22:18:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.8505629477993857) internal successors, (2785), 977 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2785 transitions. [2022-03-15 22:18:31,409 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2785 transitions. Word has length 18 [2022-03-15 22:18:31,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:31,409 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 2785 transitions. [2022-03-15 22:18:31,409 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 22:18:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2785 transitions. [2022-03-15 22:18:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:31,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:31,410 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:31,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:31,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:31,621 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:31,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1477658703, now seen corresponding path program 128 times [2022-03-15 22:18:31,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:31,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974404281] [2022-03-15 22:18:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:31,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:31,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974404281] [2022-03-15 22:18:31,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974404281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:31,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129164682] [2022-03-15 22:18:31,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:18:31,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:31,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:31,780 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 22:18:31,781 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 22:18:31,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:18:31,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:18:31,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:32,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:32,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129164682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:32,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:32,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 28 [2022-03-15 22:18:32,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [847534251] [2022-03-15 22:18:32,412 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:32,413 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:32,415 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 22:18:32,415 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:32,597 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [171299#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 171298#(or (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 171297#(or (< j1 M1) (<= (+ j2 1) M2)), 171296#(< j1 M1)] [2022-03-15 22:18:32,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:18:32,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:32,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:18:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:18:32,598 INFO L87 Difference]: Start difference. First operand 978 states and 2785 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 22:18:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:33,102 INFO L93 Difference]: Finished difference Result 1024 states and 2881 transitions. [2022-03-15 22:18:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:18:33,102 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 18 [2022-03-15 22:18:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:33,103 INFO L225 Difference]: With dead ends: 1024 [2022-03-15 22:18:33,103 INFO L226 Difference]: Without dead ends: 1024 [2022-03-15 22:18:33,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=1633, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:18:33,104 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:33,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-03-15 22:18:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 979. [2022-03-15 22:18:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 2.850715746421268) internal successors, (2788), 978 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 2788 transitions. [2022-03-15 22:18:33,114 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 2788 transitions. Word has length 18 [2022-03-15 22:18:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:33,114 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 2788 transitions. [2022-03-15 22:18:33,114 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 22:18:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 2788 transitions. [2022-03-15 22:18:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:33,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:33,115 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:33,134 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 22:18:33,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-15 22:18:33,323 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:33,323 INFO L85 PathProgramCache]: Analyzing trace with hash 433106246, now seen corresponding path program 129 times [2022-03-15 22:18:33,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:33,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164901519] [2022-03-15 22:18:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:33,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:33,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:33,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164901519] [2022-03-15 22:18:33,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164901519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:33,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456743531] [2022-03-15 22:18:33,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:18:33,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:33,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:33,493 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 22:18:33,493 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 22:18:33,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:18:33,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:33,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 22:18:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:33,916 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 22:18:33,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:34,683 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 22:18:34,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456743531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:34,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:34,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 32 [2022-03-15 22:18:34,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1022197003] [2022-03-15 22:18:34,683 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:34,684 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:34,686 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 28 transitions. [2022-03-15 22:18:34,686 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:34,782 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [174439#(< j1 M1), 174440#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1)))), 174441#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:18:34,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:18:34,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:18:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1011, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:18:34,783 INFO L87 Difference]: Start difference. First operand 979 states and 2788 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:18:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:35,222 INFO L93 Difference]: Finished difference Result 1197 states and 3229 transitions. [2022-03-15 22:18:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:18:35,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:18:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:35,224 INFO L225 Difference]: With dead ends: 1197 [2022-03-15 22:18:35,224 INFO L226 Difference]: Without dead ends: 1197 [2022-03-15 22:18:35,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=611, Invalid=2145, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:18:35,224 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:35,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:18:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2022-03-15 22:18:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 701. [2022-03-15 22:18:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.755714285714286) internal successors, (1929), 700 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1929 transitions. [2022-03-15 22:18:35,234 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1929 transitions. Word has length 18 [2022-03-15 22:18:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:35,235 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 1929 transitions. [2022-03-15 22:18:35,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:18:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1929 transitions. [2022-03-15 22:18:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:35,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:35,235 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:35,251 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 22:18:35,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-03-15 22:18:35,438 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2119050715, now seen corresponding path program 130 times [2022-03-15 22:18:35,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:35,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283463534] [2022-03-15 22:18:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:35,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:35,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283463534] [2022-03-15 22:18:35,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283463534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:35,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559004451] [2022-03-15 22:18:35,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:18:35,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:35,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:35,700 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 22:18:35,701 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 22:18:35,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:18:35,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:35,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:18:35,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:36,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:36,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559004451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:36,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:36,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 30 [2022-03-15 22:18:36,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1636149721] [2022-03-15 22:18:36,559 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:36,560 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:36,562 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 28 transitions. [2022-03-15 22:18:36,562 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:36,667 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [177211#(or (< j2 M2) (< j1 M1) (= counter 0)), 177209#(or (< j1 M1) (= counter 0)), 177210#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:18:36,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:18:36,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:36,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:18:36,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:18:36,667 INFO L87 Difference]: Start difference. First operand 701 states and 1929 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:37,024 INFO L93 Difference]: Finished difference Result 722 states and 1965 transitions. [2022-03-15 22:18:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:18:37,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:37,025 INFO L225 Difference]: With dead ends: 722 [2022-03-15 22:18:37,025 INFO L226 Difference]: Without dead ends: 718 [2022-03-15 22:18:37,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=1716, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:18:37,025 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:37,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:18:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-03-15 22:18:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 702. [2022-03-15 22:18:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 2.754636233951498) internal successors, (1931), 701 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1931 transitions. [2022-03-15 22:18:37,033 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1931 transitions. Word has length 18 [2022-03-15 22:18:37,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:37,033 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1931 transitions. [2022-03-15 22:18:37,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:37,033 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1931 transitions. [2022-03-15 22:18:37,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:37,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:37,034 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:37,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:37,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:37,249 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:37,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1253804755, now seen corresponding path program 131 times [2022-03-15 22:18:37,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:37,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547774064] [2022-03-15 22:18:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:37,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:37,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:37,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547774064] [2022-03-15 22:18:37,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547774064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:37,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952254286] [2022-03-15 22:18:37,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:18:37,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:37,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:37,398 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 22:18:37,399 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 22:18:37,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:18:37,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:18:37,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:18:37,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:37,764 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 22:18:37,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952254286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:37,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:37,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2022-03-15 22:18:37,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1673261398] [2022-03-15 22:18:37,764 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:37,765 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:37,772 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2022-03-15 22:18:37,772 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:37,814 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [179415#(< j2 M2), 179488#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:18:37,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:18:37,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:37,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:18:37,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2022-03-15 22:18:37,815 INFO L87 Difference]: Start difference. First operand 702 states and 1931 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22:18:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:38,093 INFO L93 Difference]: Finished difference Result 880 states and 2348 transitions. [2022-03-15 22:18:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:18:38,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22:18:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:38,095 INFO L225 Difference]: With dead ends: 880 [2022-03-15 22:18:38,095 INFO L226 Difference]: Without dead ends: 879 [2022-03-15 22:18:38,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=1208, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:18:38,095 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:38,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:18:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-03-15 22:18:38,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 701. [2022-03-15 22:18:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.755714285714286) internal successors, (1929), 700 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1929 transitions. [2022-03-15 22:18:38,103 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1929 transitions. Word has length 18 [2022-03-15 22:18:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:38,103 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 1929 transitions. [2022-03-15 22:18:38,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22:18:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1929 transitions. [2022-03-15 22:18:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:38,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:38,104 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:38,120 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 22:18:38,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:38,319 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1054091471, now seen corresponding path program 132 times [2022-03-15 22:18:38,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:38,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847300897] [2022-03-15 22:18:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:38,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:38,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:38,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847300897] [2022-03-15 22:18:38,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847300897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:38,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083561848] [2022-03-15 22:18:38,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:18:38,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:38,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:38,519 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 22:18:38,520 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 22:18:38,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:18:38,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:38,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:18:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:38,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:18:38,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083561848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:38,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:38,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 27 [2022-03-15 22:18:38,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1035503636] [2022-03-15 22:18:38,868 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:38,869 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:38,871 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2022-03-15 22:18:38,871 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:39,307 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [181925#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 181923#(or (< j1 M1) (<= (+ j2 1) M2)), 181922#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 181926#(and (or (<= 4 M2) (< j1 M1) (<= 1 counter)) (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))) (or (< j1 M1) (<= j2 1) (<= 1 counter))), 181924#(or (< j1 M1) (<= (+ 2 j2) M2)), 181921#(< j1 M1)] [2022-03-15 22:18:39,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:18:39,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:39,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:18:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:18:39,308 INFO L87 Difference]: Start difference. First operand 701 states and 1929 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 22:18:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:39,918 INFO L93 Difference]: Finished difference Result 744 states and 2014 transitions. [2022-03-15 22:18:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:18:39,918 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 18 [2022-03-15 22:18:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:39,919 INFO L225 Difference]: With dead ends: 744 [2022-03-15 22:18:39,919 INFO L226 Difference]: Without dead ends: 734 [2022-03-15 22:18:39,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:18:39,920 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:39,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-03-15 22:18:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 695. [2022-03-15 22:18:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.7536023054755043) internal successors, (1911), 694 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1911 transitions. [2022-03-15 22:18:39,927 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1911 transitions. Word has length 18 [2022-03-15 22:18:39,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:39,927 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1911 transitions. [2022-03-15 22:18:39,927 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 22:18:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1911 transitions. [2022-03-15 22:18:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:39,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:39,928 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:39,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:40,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 22:18:40,139 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:40,140 INFO L85 PathProgramCache]: Analyzing trace with hash -193016637, now seen corresponding path program 133 times [2022-03-15 22:18:40,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:40,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951147056] [2022-03-15 22:18:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:40,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:40,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:40,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951147056] [2022-03-15 22:18:40,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951147056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:40,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78860166] [2022-03-15 22:18:40,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:18:40,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:40,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:40,493 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 22:18:40,494 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 22:18:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:18:40,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:40,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:41,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78860166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:41,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:41,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 30 [2022-03-15 22:18:41,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [611538085] [2022-03-15 22:18:41,626 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:41,627 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:41,628 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 28 transitions. [2022-03-15 22:18:41,628 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:41,806 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [184217#(or (< j2 M2) (< j1 M1) (= counter 0)), 184216#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 184215#(or (< j1 M1) (= counter 0))] [2022-03-15 22:18:41,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:18:41,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:41,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:18:41,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:18:41,807 INFO L87 Difference]: Start difference. First operand 695 states and 1911 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:42,556 INFO L93 Difference]: Finished difference Result 725 states and 1967 transitions. [2022-03-15 22:18:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:18:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:42,558 INFO L225 Difference]: With dead ends: 725 [2022-03-15 22:18:42,558 INFO L226 Difference]: Without dead ends: 717 [2022-03-15 22:18:42,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:18:42,558 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:42,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-03-15 22:18:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 698. [2022-03-15 22:18:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.750358680057389) internal successors, (1917), 697 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1917 transitions. [2022-03-15 22:18:42,565 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1917 transitions. Word has length 18 [2022-03-15 22:18:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:42,565 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1917 transitions. [2022-03-15 22:18:42,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1917 transitions. [2022-03-15 22:18:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:42,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:42,566 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:42,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:42,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-15 22:18:42,767 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:42,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1551220709, now seen corresponding path program 134 times [2022-03-15 22:18:42,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:42,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594373861] [2022-03-15 22:18:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:42,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:43,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:43,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594373861] [2022-03-15 22:18:43,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594373861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:43,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936465440] [2022-03-15 22:18:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:18:43,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:43,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:43,024 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 22:18:43,025 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 22:18:43,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:18:43,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:18:43,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:43,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:18:43,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936465440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:43,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:43,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2022-03-15 22:18:43,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1332836567] [2022-03-15 22:18:43,419 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:43,420 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:43,422 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 36 transitions. [2022-03-15 22:18:43,422 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:43,648 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [186492#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 186494#(or (< j1 M1) (<= (+ j2 1) M2)), 186493#(< j1 M1), 186495#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 186496#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)))] [2022-03-15 22:18:43,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:18:43,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:43,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:18:43,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:18:43,649 INFO L87 Difference]: Start difference. First operand 698 states and 1917 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 22:18:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:44,517 INFO L93 Difference]: Finished difference Result 784 states and 2098 transitions. [2022-03-15 22:18:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:18:44,518 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 22:18:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:44,519 INFO L225 Difference]: With dead ends: 784 [2022-03-15 22:18:44,519 INFO L226 Difference]: Without dead ends: 783 [2022-03-15 22:18:44,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=2656, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 22:18:44,519 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:44,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-03-15 22:18:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 709. [2022-03-15 22:18:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 2.748587570621469) internal successors, (1946), 708 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1946 transitions. [2022-03-15 22:18:44,527 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1946 transitions. Word has length 18 [2022-03-15 22:18:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:44,527 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 1946 transitions. [2022-03-15 22:18:44,527 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 22:18:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1946 transitions. [2022-03-15 22:18:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:44,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:44,528 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:44,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:44,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-15 22:18:44,739 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash 655391984, now seen corresponding path program 135 times [2022-03-15 22:18:44,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:44,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894689900] [2022-03-15 22:18:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:44,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:44,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:44,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894689900] [2022-03-15 22:18:44,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894689900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:44,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394499193] [2022-03-15 22:18:44,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:18:44,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:44,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:44,880 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 22:18:44,880 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 22:18:44,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 22:18:44,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:44,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:18:44,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:45,493 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 22:18:45,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:45,922 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 22:18:45,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394499193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:45,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:45,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-03-15 22:18:45,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1830052386] [2022-03-15 22:18:45,922 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:45,923 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:45,925 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 22:18:45,925 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:46,038 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [188885#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1)))), 188882#(< j1 M1), 188884#(or (< j1 M1) (<= (+ 2 j2) M2)), 188883#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:18:46,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:18:46,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:46,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:18:46,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:18:46,039 INFO L87 Difference]: Start difference. First operand 709 states and 1946 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 22:18:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:46,370 INFO L93 Difference]: Finished difference Result 863 states and 2269 transitions. [2022-03-15 22:18:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:18:46,370 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 18 [2022-03-15 22:18:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:46,371 INFO L225 Difference]: With dead ends: 863 [2022-03-15 22:18:46,371 INFO L226 Difference]: Without dead ends: 863 [2022-03-15 22:18:46,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=578, Invalid=2284, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:18:46,372 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:46,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:18:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-03-15 22:18:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 714. [2022-03-15 22:18:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.7517531556802246) internal successors, (1962), 713 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1962 transitions. [2022-03-15 22:18:46,381 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1962 transitions. Word has length 18 [2022-03-15 22:18:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:46,381 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 1962 transitions. [2022-03-15 22:18:46,381 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 22:18:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1962 transitions. [2022-03-15 22:18:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:46,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:46,382 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:46,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:46,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-15 22:18:46,592 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:46,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1793454491, now seen corresponding path program 136 times [2022-03-15 22:18:46,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:46,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200997936] [2022-03-15 22:18:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:46,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:46,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:46,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200997936] [2022-03-15 22:18:46,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200997936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:46,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538805535] [2022-03-15 22:18:46,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:18:46,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:46,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:46,907 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 22:18:46,908 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 22:18:46,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:18:46,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:46,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:18:46,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:47,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:48,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538805535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:48,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:48,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 30 [2022-03-15 22:18:48,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1778287961] [2022-03-15 22:18:48,101 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:48,101 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:48,103 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 28 transitions. [2022-03-15 22:18:48,103 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:48,258 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [191342#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 191343#(or (< j2 M2) (< j1 M1) (= counter 0)), 191341#(or (< j1 M1) (= counter 0))] [2022-03-15 22:18:48,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:18:48,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:48,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:18:48,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:18:48,259 INFO L87 Difference]: Start difference. First operand 714 states and 1962 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:48,932 INFO L93 Difference]: Finished difference Result 801 states and 2138 transitions. [2022-03-15 22:18:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:18:48,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:48,934 INFO L225 Difference]: With dead ends: 801 [2022-03-15 22:18:48,934 INFO L226 Difference]: Without dead ends: 793 [2022-03-15 22:18:48,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:18:48,934 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:48,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:18:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-03-15 22:18:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 711. [2022-03-15 22:18:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 2.7549295774647886) internal successors, (1956), 710 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1956 transitions. [2022-03-15 22:18:48,942 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1956 transitions. Word has length 18 [2022-03-15 22:18:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:48,942 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1956 transitions. [2022-03-15 22:18:48,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1956 transitions. [2022-03-15 22:18:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:48,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:48,943 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:48,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:49,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:49,155 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash 631605745, now seen corresponding path program 137 times [2022-03-15 22:18:49,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:49,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857373406] [2022-03-15 22:18:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:49,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:49,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:49,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857373406] [2022-03-15 22:18:49,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857373406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:49,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910867366] [2022-03-15 22:18:49,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:18:49,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:49,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:49,330 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 22:18:49,331 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 22:18:49,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 22:18:49,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:49,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:18:49,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:49,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:49,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910867366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:49,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:49,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 27 [2022-03-15 22:18:49,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [806729597] [2022-03-15 22:18:49,700 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:49,701 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:49,703 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2022-03-15 22:18:49,703 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:50,009 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [193729#(or (< j1 M1) (<= (+ j2 1) M2)), 193728#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 193731#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 193727#(< j1 M1), 193730#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 193732#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2)))] [2022-03-15 22:18:50,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:18:50,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:50,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:18:50,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:18:50,010 INFO L87 Difference]: Start difference. First operand 711 states and 1956 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 22:18:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:50,552 INFO L93 Difference]: Finished difference Result 744 states and 2020 transitions. [2022-03-15 22:18:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:18:50,553 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 18 [2022-03-15 22:18:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:50,554 INFO L225 Difference]: With dead ends: 744 [2022-03-15 22:18:50,554 INFO L226 Difference]: Without dead ends: 733 [2022-03-15 22:18:50,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:18:50,554 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:50,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-15 22:18:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 710. [2022-03-15 22:18:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.7475317348378) internal successors, (1948), 709 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1948 transitions. [2022-03-15 22:18:50,562 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1948 transitions. Word has length 18 [2022-03-15 22:18:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:50,562 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 1948 transitions. [2022-03-15 22:18:50,562 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 22:18:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1948 transitions. [2022-03-15 22:18:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:50,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:50,563 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:50,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:50,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-15 22:18:50,778 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:50,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1369280954, now seen corresponding path program 138 times [2022-03-15 22:18:50,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:50,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528024586] [2022-03-15 22:18:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:50,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:50,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:50,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528024586] [2022-03-15 22:18:50,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528024586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:50,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037643061] [2022-03-15 22:18:50,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:18:50,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:50,881 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 22:18:50,881 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 22:18:50,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:18:50,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 22:18:50,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:51,605 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 22:18:51,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:52,212 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 22:18:52,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037643061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:52,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:52,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 33 [2022-03-15 22:18:52,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1942723417] [2022-03-15 22:18:52,212 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:52,213 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:52,215 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 36 transitions. [2022-03-15 22:18:52,215 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:52,460 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [196063#(or (< j1 M1) (<= (+ j2 1) M2)), 196061#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1)))), 196062#(< j1 M1), 196065#(or (< j1 M1) (<= (+ 3 j2) M2)), 196064#(or (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:18:52,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:18:52,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:18:52,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:18:52,461 INFO L87 Difference]: Start difference. First operand 710 states and 1948 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 22:18:52,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:52,924 INFO L93 Difference]: Finished difference Result 871 states and 2265 transitions. [2022-03-15 22:18:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:18:52,925 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 22:18:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:52,926 INFO L225 Difference]: With dead ends: 871 [2022-03-15 22:18:52,926 INFO L226 Difference]: Without dead ends: 871 [2022-03-15 22:18:52,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=607, Invalid=2363, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 22:18:52,927 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:52,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:18:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-03-15 22:18:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 637. [2022-03-15 22:18:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.7279874213836477) internal successors, (1735), 636 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1735 transitions. [2022-03-15 22:18:52,934 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1735 transitions. Word has length 18 [2022-03-15 22:18:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:52,934 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1735 transitions. [2022-03-15 22:18:52,934 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 22:18:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1735 transitions. [2022-03-15 22:18:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:52,935 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:52,935 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:52,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:53,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-15 22:18:53,150 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:53,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1565794459, now seen corresponding path program 139 times [2022-03-15 22:18:53,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:53,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247405120] [2022-03-15 22:18:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:53,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:53,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:53,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247405120] [2022-03-15 22:18:53,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247405120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:53,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034064298] [2022-03-15 22:18:53,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:18:53,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:53,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:53,447 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 22:18:53,448 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 22:18:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:53,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:18:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:53,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:18:53,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034064298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:53,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:53,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 25 [2022-03-15 22:18:53,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [100877806] [2022-03-15 22:18:53,944 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:53,945 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:53,947 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 36 transitions. [2022-03-15 22:18:53,947 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:54,255 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [198374#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 198375#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 2 j2) M2) (< 0 counter))), 198373#(or (< j1 M1) (<= (+ j2 1) M2)), 198372#(< j1 M1), 198371#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:18:54,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:18:54,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:54,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:18:54,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:18:54,256 INFO L87 Difference]: Start difference. First operand 637 states and 1735 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 22:18:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:54,976 INFO L93 Difference]: Finished difference Result 701 states and 1880 transitions. [2022-03-15 22:18:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:18:54,976 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 22:18:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:54,977 INFO L225 Difference]: With dead ends: 701 [2022-03-15 22:18:54,977 INFO L226 Difference]: Without dead ends: 700 [2022-03-15 22:18:54,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:18:54,978 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:54,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-15 22:18:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 640. [2022-03-15 22:18:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.729264475743349) internal successors, (1744), 639 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1744 transitions. [2022-03-15 22:18:54,985 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1744 transitions. Word has length 18 [2022-03-15 22:18:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:54,985 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1744 transitions. [2022-03-15 22:18:54,985 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 22:18:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1744 transitions. [2022-03-15 22:18:54,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:54,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:54,986 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:55,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:55,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:55,200 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:55,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:55,200 INFO L85 PathProgramCache]: Analyzing trace with hash 25889649, now seen corresponding path program 140 times [2022-03-15 22:18:55,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:55,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106171544] [2022-03-15 22:18:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:55,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:55,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:55,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106171544] [2022-03-15 22:18:55,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106171544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:55,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461103117] [2022-03-15 22:18:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:18:55,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:55,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:55,397 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 22:18:55,398 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 22:18:55,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:18:55,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:55,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:18:55,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:55,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:18:55,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461103117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:55,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:55,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 26 [2022-03-15 22:18:55,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1056857834] [2022-03-15 22:18:55,727 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:55,727 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:55,729 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 22:18:55,729 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:55,856 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [200517#(or (< j1 M1) (<= (+ j2 1) M2)), 200518#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 200516#(< j1 M1), 200519#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:18:55,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:18:55,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:55,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:18:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:18:55,857 INFO L87 Difference]: Start difference. First operand 640 states and 1744 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 22:18:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:56,497 INFO L93 Difference]: Finished difference Result 738 states and 1967 transitions. [2022-03-15 22:18:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:18:56,498 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 18 [2022-03-15 22:18:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:56,499 INFO L225 Difference]: With dead ends: 738 [2022-03-15 22:18:56,499 INFO L226 Difference]: Without dead ends: 737 [2022-03-15 22:18:56,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=331, Invalid=2219, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:18:56,499 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:56,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-03-15 22:18:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 640. [2022-03-15 22:18:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.727699530516432) internal successors, (1743), 639 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1743 transitions. [2022-03-15 22:18:56,506 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1743 transitions. Word has length 18 [2022-03-15 22:18:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:56,506 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1743 transitions. [2022-03-15 22:18:56,507 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 22:18:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1743 transitions. [2022-03-15 22:18:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:56,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:56,507 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:56,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-15 22:18:56,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:56,712 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash -615502363, now seen corresponding path program 141 times [2022-03-15 22:18:56,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:56,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107550151] [2022-03-15 22:18:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:56,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:56,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107550151] [2022-03-15 22:18:56,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107550151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:56,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174466473] [2022-03-15 22:18:56,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:18:56,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:56,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:56,967 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 22:18:56,967 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 22:18:56,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:18:56,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:56,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:18:56,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:57,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:57,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174466473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:57,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:57,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 30 [2022-03-15 22:18:57,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1993840682] [2022-03-15 22:18:57,811 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:57,811 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:57,813 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 28 transitions. [2022-03-15 22:18:57,813 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:57,909 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [202713#(and (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1)))), 202714#(or (< j2 M2) (< j1 M1) (= counter 0)), 202712#(or (< j1 M1) (= counter 0))] [2022-03-15 22:18:57,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:18:57,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:57,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:18:57,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:18:57,910 INFO L87 Difference]: Start difference. First operand 640 states and 1743 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:58,723 INFO L93 Difference]: Finished difference Result 735 states and 1922 transitions. [2022-03-15 22:18:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 22:18:58,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:58,724 INFO L225 Difference]: With dead ends: 735 [2022-03-15 22:18:58,724 INFO L226 Difference]: Without dead ends: 728 [2022-03-15 22:18:58,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=482, Invalid=2710, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 22:18:58,725 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:58,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:18:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-03-15 22:18:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 640. [2022-03-15 22:18:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.7261345852895147) internal successors, (1742), 639 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1742 transitions. [2022-03-15 22:18:58,733 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1742 transitions. Word has length 18 [2022-03-15 22:18:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:58,733 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1742 transitions. [2022-03-15 22:18:58,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:18:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1742 transitions. [2022-03-15 22:18:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:58,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:58,733 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:58,752 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 22:18:58,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:58,949 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:58,949 INFO L85 PathProgramCache]: Analyzing trace with hash 249743597, now seen corresponding path program 142 times [2022-03-15 22:18:58,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:58,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251989735] [2022-03-15 22:18:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:58,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:18:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:18:59,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:18:59,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251989735] [2022-03-15 22:18:59,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251989735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:18:59,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566332904] [2022-03-15 22:18:59,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:18:59,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:18:59,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:18:59,112 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 22:18:59,112 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 22:18:59,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:18:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:18:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:18:59,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:18:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:18:59,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:18:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:18:59,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566332904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:18:59,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:18:59,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 25 [2022-03-15 22:18:59,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2144211578] [2022-03-15 22:18:59,391 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:18:59,403 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:18:59,405 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2022-03-15 22:18:59,405 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:18:59,444 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [204902#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 204830#(< j2 M2)] [2022-03-15 22:18:59,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:18:59,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:18:59,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:18:59,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:18:59,444 INFO L87 Difference]: Start difference. First operand 640 states and 1742 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22:18:59,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:18:59,744 INFO L93 Difference]: Finished difference Result 843 states and 2232 transitions. [2022-03-15 22:18:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:18:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22:18:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:18:59,745 INFO L225 Difference]: With dead ends: 843 [2022-03-15 22:18:59,745 INFO L226 Difference]: Without dead ends: 842 [2022-03-15 22:18:59,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:18:59,746 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:18:59,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:18:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-15 22:18:59,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 640. [2022-03-15 22:18:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.7261345852895147) internal successors, (1742), 639 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:18:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1742 transitions. [2022-03-15 22:18:59,753 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1742 transitions. Word has length 18 [2022-03-15 22:18:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:18:59,753 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1742 transitions. [2022-03-15 22:18:59,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 22:18:59,753 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1742 transitions. [2022-03-15 22:18:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:18:59,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:18:59,754 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:18:59,770 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 22:18:59,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-03-15 22:18:59,966 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:18:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:18:59,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1128734983, now seen corresponding path program 143 times [2022-03-15 22:18:59,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:18:59,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960044821] [2022-03-15 22:18:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:18:59,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:18:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:00,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:00,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960044821] [2022-03-15 22:19:00,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960044821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:00,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021483588] [2022-03-15 22:19:00,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:19:00,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:00,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:00,210 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 22:19:00,210 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 22:19:00,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 22:19:00,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:00,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:19:00,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:00,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:19:00,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021483588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:00,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:00,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2022-03-15 22:19:00,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [170012907] [2022-03-15 22:19:00,626 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:00,626 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:00,628 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 36 transitions. [2022-03-15 22:19:00,628 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:00,828 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [207186#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 207187#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 207183#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 207184#(< j1 M1), 207185#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:19:00,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:19:00,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:19:00,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:19:00,828 INFO L87 Difference]: Start difference. First operand 640 states and 1742 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 22:19:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:01,713 INFO L93 Difference]: Finished difference Result 719 states and 1906 transitions. [2022-03-15 22:19:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 22:19:01,713 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 22:19:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:01,714 INFO L225 Difference]: With dead ends: 719 [2022-03-15 22:19:01,714 INFO L226 Difference]: Without dead ends: 718 [2022-03-15 22:19:01,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=2770, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 22:19:01,715 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:01,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:19:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-03-15 22:19:01,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 640. [2022-03-15 22:19:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.7261345852895147) internal successors, (1742), 639 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1742 transitions. [2022-03-15 22:19:01,731 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1742 transitions. Word has length 18 [2022-03-15 22:19:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:01,731 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1742 transitions. [2022-03-15 22:19:01,731 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 22:19:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1742 transitions. [2022-03-15 22:19:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:19:01,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:01,732 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:01,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-15 22:19:01,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-15 22:19:01,948 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2079027079, now seen corresponding path program 144 times [2022-03-15 22:19:01,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:01,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107767000] [2022-03-15 22:19:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:01,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:02,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:02,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107767000] [2022-03-15 22:19:02,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107767000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:02,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16074146] [2022-03-15 22:19:02,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:19:02,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:02,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:02,155 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 22:19:02,156 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 22:19:02,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:19:02,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:02,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:19:02,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:02,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:02,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16074146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:02,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:02,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 30 [2022-03-15 22:19:02,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1488860530] [2022-03-15 22:19:02,982 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:02,982 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:02,984 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 28 transitions. [2022-03-15 22:19:02,984 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:03,116 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [209369#(or (< j1 M1) (= counter 0)), 209371#(or (< j2 M2) (< j1 M1) (= counter 0)), 209370#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:19:03,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:19:03,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:19:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:19:03,117 INFO L87 Difference]: Start difference. First operand 640 states and 1742 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:19:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:04,014 INFO L93 Difference]: Finished difference Result 811 states and 2098 transitions. [2022-03-15 22:19:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:19:04,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:19:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:04,015 INFO L225 Difference]: With dead ends: 811 [2022-03-15 22:19:04,015 INFO L226 Difference]: Without dead ends: 798 [2022-03-15 22:19:04,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=435, Invalid=2321, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:19:04,016 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:04,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:19:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-03-15 22:19:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 642. [2022-03-15 22:19:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.7238689547581902) internal successors, (1746), 641 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1746 transitions. [2022-03-15 22:19:04,023 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1746 transitions. Word has length 18 [2022-03-15 22:19:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:04,023 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1746 transitions. [2022-03-15 22:19:04,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 22:19:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1746 transitions. [2022-03-15 22:19:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:19:04,024 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:04,024 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:04,040 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 22:19:04,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-15 22:19:04,240 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:04,241 INFO L85 PathProgramCache]: Analyzing trace with hash 105986531, now seen corresponding path program 145 times [2022-03-15 22:19:04,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:04,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708120366] [2022-03-15 22:19:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:04,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:04,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:04,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708120366] [2022-03-15 22:19:04,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708120366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:04,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212468644] [2022-03-15 22:19:04,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:19:04,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:04,369 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 22:19:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:04,416 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 22:19:04,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:19:04,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:19:04,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:19:04,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212468644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:04,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:04,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 20 [2022-03-15 22:19:04,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [935039333] [2022-03-15 22:19:04,656 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:04,656 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:04,658 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2022-03-15 22:19:04,658 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:04,750 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:19:04,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:19:04,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:19:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-03-15 22:19:04,751 INFO L87 Difference]: Start difference. First operand 642 states and 1746 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 22:19:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:05,029 INFO L93 Difference]: Finished difference Result 1006 states and 2602 transitions. [2022-03-15 22:19:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:19:05,030 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 18 [2022-03-15 22:19:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:05,031 INFO L225 Difference]: With dead ends: 1006 [2022-03-15 22:19:05,031 INFO L226 Difference]: Without dead ends: 940 [2022-03-15 22:19:05,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:19:05,031 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:05,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:19:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-03-15 22:19:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 691. [2022-03-15 22:19:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 2.727536231884058) internal successors, (1882), 690 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1882 transitions. [2022-03-15 22:19:05,039 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1882 transitions. Word has length 18 [2022-03-15 22:19:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:05,039 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1882 transitions. [2022-03-15 22:19:05,039 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 22:19:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1882 transitions. [2022-03-15 22:19:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:05,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:05,040 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:05,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-15 22:19:05,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:05,256 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2045858472, now seen corresponding path program 146 times [2022-03-15 22:19:05,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:05,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269939174] [2022-03-15 22:19:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:05,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:05,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:05,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269939174] [2022-03-15 22:19:05,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269939174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:05,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413803449] [2022-03-15 22:19:05,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:19:05,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:05,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:05,460 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 22:19:05,460 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 22:19:05,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:19:05,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:19:05,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:05,687 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 22:19:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:05,886 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 22:19:05,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413803449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:05,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:05,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-03-15 22:19:05,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [176874943] [2022-03-15 22:19:05,886 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:05,887 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:05,890 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 59 transitions. [2022-03-15 22:19:05,890 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:06,969 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [214200#(and (or (< j1 M1) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 4)) (<= counter C) (<= 5 M2)) (or (<= j2 0) (< j1 M1) (<= M2 (+ j2 4)) (<= counter C)) (or (< j1 M1) (not (= C 0)) (<= counter (* C 4))) (or (<= j2 0) (< j1 M1) (<= (* C 4) counter)) (or (< j1 M1) (<= 5 M2) (<= (* C 4) counter)) (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 4)))), 214196#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 214201#(and (or (< j1 M1) (<= counter (* 5 C))) (or (< j1 M1) (<= 5 M2)) (or (< j1 M1) (<= M2 (+ 5 j2))) (or (< j1 M1) (<= (* 5 C) counter)) (or (<= j2 0) (< j1 M1))), 214203#(and (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= (* 3 C) counter)) (or (< (+ 2 j1) M1) (<= counter (* 3 C)) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= 5 M2)) (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= M2 (+ 5 j2))) (or (< (+ 2 j1) M1) (<= j2 0) (not (< (+ j1 1) M1)))), 214194#(< j1 M1), 214199#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 3 j2))) (or (<= counter 0) (< j1 M1) (<= (* 3 C) counter))), 214205#(and (or (not (< (+ 3 j1) M1)) (<= C counter) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (< (+ j1 4) M1) (<= 5 M2)) (or (not (< (+ 3 j1) M1)) (<= j2 0) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (< (+ j1 4) M1) (<= M2 (+ 5 j2))) (or (not (< (+ 3 j1) M1)) (<= counter C) (< (+ j1 4) M1))), 214206#(and (or (not (< (+ j1 4) M1)) (< (+ 5 j1) M1) (<= 5 M2)) (or (not (< (+ j1 4) M1)) (<= counter 0) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (<= j2 0) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (<= 0 counter) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (< (+ 5 j1) M1) (<= M2 (+ 5 j2)))), 214195#(or (< j1 M1) (<= (+ j2 1) M2)), 214202#(and (or (not (< j1 M1)) (< (+ j1 1) M1) (<= M2 (+ 5 j2))) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= 5 M2)) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= counter (* C 4))) (or (not (< j1 M1)) (<= j2 0) (< (+ j1 1) M1)) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (* C 4) counter))), 214197#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 214198#(and (or (< j1 M1) (<= (* 2 C) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))), 214204#(and (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= 5 M2)) (or (<= j2 0) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= M2 (+ 5 j2))) (or (<= counter (* 2 C)) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= (* 2 C) counter)))] [2022-03-15 22:19:06,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 22:19:06,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 22:19:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:19:06,970 INFO L87 Difference]: Start difference. First operand 691 states and 1882 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:09,896 INFO L93 Difference]: Finished difference Result 875 states and 2280 transitions. [2022-03-15 22:19:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 22:19:09,897 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:19:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:09,898 INFO L225 Difference]: With dead ends: 875 [2022-03-15 22:19:09,898 INFO L226 Difference]: Without dead ends: 875 [2022-03-15 22:19:09,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=774, Invalid=4926, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 22:19:09,899 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 154 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:09,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 0 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:19:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-03-15 22:19:09,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 694. [2022-03-15 22:19:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.7258297258297257) internal successors, (1889), 693 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1889 transitions. [2022-03-15 22:19:09,906 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1889 transitions. Word has length 19 [2022-03-15 22:19:09,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:09,906 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 1889 transitions. [2022-03-15 22:19:09,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1889 transitions. [2022-03-15 22:19:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:09,907 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:09,907 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:09,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-15 22:19:10,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-15 22:19:10,123 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:10,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2086748021, now seen corresponding path program 147 times [2022-03-15 22:19:10,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:10,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443199136] [2022-03-15 22:19:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:10,197 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 22:19:10,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:10,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443199136] [2022-03-15 22:19:10,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443199136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:10,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661013501] [2022-03-15 22:19:10,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:19:10,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:10,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:10,198 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 22:19:10,205 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 22:19:10,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:19:10,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:10,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 22:19:10,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:10,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:11,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661013501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:11,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:11,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 39 [2022-03-15 22:19:11,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1406063599] [2022-03-15 22:19:11,051 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:11,052 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:11,055 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 57 transitions. [2022-03-15 22:19:11,055 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:11,438 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [216687#(or (<= (+ 6 j2) M2) (< (+ 5 j1) M1) (<= M1 (+ j1 4))), 216680#(or (< j1 M1) (<= (+ j2 4) M2)), 216678#(or (< j1 M1) (<= (+ 2 j2) M2)), 216676#(< j1 M1), 216679#(or (< j1 M1) (<= (+ 3 j2) M2)), 216684#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ 6 j2) M2)), 216681#(or (< j1 M1) (<= (+ 5 j2) M2)), 216685#(or (<= M1 (+ 2 j1)) (<= (+ 6 j2) M2) (< (+ 3 j1) M1)), 216688#(or (<= (+ 6 j2) M2) (<= M1 (+ 5 j1)) (< (+ 6 j1) M1)), 216682#(or (<= (+ 6 j2) M2) (< j1 M1)), 216686#(or (<= M1 (+ 3 j1)) (<= (+ 6 j2) M2) (< (+ j1 4) M1)), 216683#(or (<= (+ 6 j2) M2) (< (+ j1 1) M1) (<= M1 j1)), 216677#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:19:11,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 22:19:11,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 22:19:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=2289, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:19:11,439 INFO L87 Difference]: Start difference. First operand 694 states and 1889 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:11,942 INFO L93 Difference]: Finished difference Result 922 states and 2280 transitions. [2022-03-15 22:19:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:19:11,942 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:19:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:11,943 INFO L225 Difference]: With dead ends: 922 [2022-03-15 22:19:11,943 INFO L226 Difference]: Without dead ends: 922 [2022-03-15 22:19:11,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1165, Invalid=4385, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 22:19:11,944 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:11,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 0 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:19:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-03-15 22:19:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 707. [2022-03-15 22:19:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 2.73371104815864) internal successors, (1930), 706 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1930 transitions. [2022-03-15 22:19:11,951 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1930 transitions. Word has length 19 [2022-03-15 22:19:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:11,952 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 1930 transitions. [2022-03-15 22:19:11,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1930 transitions. [2022-03-15 22:19:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:11,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:11,952 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:11,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-15 22:19:12,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-15 22:19:12,168 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:12,168 INFO L85 PathProgramCache]: Analyzing trace with hash 794278081, now seen corresponding path program 148 times [2022-03-15 22:19:12,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:12,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600971688] [2022-03-15 22:19:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:12,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:12,235 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 22:19:12,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:12,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600971688] [2022-03-15 22:19:12,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600971688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:12,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117006234] [2022-03-15 22:19:12,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:19:12,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:12,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:12,236 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 22:19:12,237 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 22:19:12,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:19:12,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:12,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:19:12,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:12,572 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 22:19:12,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:12,811 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 22:19:12,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117006234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:12,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:12,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2022-03-15 22:19:12,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1971508823] [2022-03-15 22:19:12,812 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:12,812 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:12,814 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 22:19:12,815 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:13,004 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [219211#(and (or (<= M1 (+ j1 1)) (<= (+ 3 j2) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 219214#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 4))) (or (<= j2 j1) (<= M1 (+ j1 4)))), 219213#(and (or (<= M1 (+ 3 j1)) (<= (+ j2 1) j1)) (or (<= M1 (+ 3 j1)) (= (+ (* (- 1) M1) M2) 0))), 219209#(< j2 M2), 219210#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= (+ j2 4) j1) (<= M1 j1))), 219212#(and (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M1 (+ 2 j1)) (<= (+ 2 j2) j1)))] [2022-03-15 22:19:13,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:19:13,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:19:13,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:19:13,004 INFO L87 Difference]: Start difference. First operand 707 states and 1930 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:13,197 INFO L93 Difference]: Finished difference Result 809 states and 2100 transitions. [2022-03-15 22:19:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:19:13,197 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:19:13,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:13,198 INFO L225 Difference]: With dead ends: 809 [2022-03-15 22:19:13,198 INFO L226 Difference]: Without dead ends: 808 [2022-03-15 22:19:13,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=733, Invalid=2129, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:19:13,198 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:13,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:19:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-03-15 22:19:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 697. [2022-03-15 22:19:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.7270114942528734) internal successors, (1898), 696 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1898 transitions. [2022-03-15 22:19:13,206 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1898 transitions. Word has length 19 [2022-03-15 22:19:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:13,206 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1898 transitions. [2022-03-15 22:19:13,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1898 transitions. [2022-03-15 22:19:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:13,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:13,206 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:13,222 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 22:19:13,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:13,409 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash -209928952, now seen corresponding path program 149 times [2022-03-15 22:19:13,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:13,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686042180] [2022-03-15 22:19:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:13,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:13,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:13,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686042180] [2022-03-15 22:19:13,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686042180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:13,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815221875] [2022-03-15 22:19:13,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:19:13,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:13,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:13,641 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 22:19:13,642 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 22:19:13,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:19:13,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:13,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 22:19:13,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:14,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:19:14,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815221875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:14,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:14,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 36 [2022-03-15 22:19:14,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [760063138] [2022-03-15 22:19:14,478 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:14,479 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:14,481 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 51 transitions. [2022-03-15 22:19:14,481 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:15,415 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [221601#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= j1 (+ 2 j2)) (not (< (+ j1 1) M1))) (or (<= 2 j1) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 221598#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 221600#(and (or (not (< j1 M1)) (<= 3 j1)) (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 3 j2)))), 221603#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* 3 C) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter))), 221599#(and (or (< j1 M1) (<= (* 2 C) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))), 221597#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 221595#(< j1 M1), 221602#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (<= j1 (+ j2 1)) (not (< (+ 2 j1) M1))) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 1 j1))), 221604#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= 0 j1)) (or (not (< (+ 3 j1) M1)) (<= j1 j2)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= j2 0))), 221596#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:19:15,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 22:19:15,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 22:19:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:19:15,416 INFO L87 Difference]: Start difference. First operand 697 states and 1898 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:17,918 INFO L93 Difference]: Finished difference Result 938 states and 2325 transitions. [2022-03-15 22:19:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 22:19:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:19:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:17,920 INFO L225 Difference]: With dead ends: 938 [2022-03-15 22:19:17,920 INFO L226 Difference]: Without dead ends: 938 [2022-03-15 22:19:17,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=820, Invalid=6662, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 22:19:17,920 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 165 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:17,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 0 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:19:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-03-15 22:19:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 697. [2022-03-15 22:19:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.7270114942528734) internal successors, (1898), 696 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1898 transitions. [2022-03-15 22:19:17,929 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1898 transitions. Word has length 19 [2022-03-15 22:19:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:17,929 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1898 transitions. [2022-03-15 22:19:17,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1898 transitions. [2022-03-15 22:19:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:17,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:17,930 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:17,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-15 22:19:18,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-03-15 22:19:18,135 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash 390141460, now seen corresponding path program 150 times [2022-03-15 22:19:18,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:18,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466691665] [2022-03-15 22:19:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:18,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:18,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:18,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466691665] [2022-03-15 22:19:18,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466691665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:18,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983404342] [2022-03-15 22:19:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:19:18,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:18,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:18,306 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 22:19:18,307 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 22:19:18,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:19:18,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:18,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:19:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:18,577 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 22:19:18,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:18,776 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 22:19:18,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983404342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:18,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:18,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 32 [2022-03-15 22:19:18,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [501356007] [2022-03-15 22:19:18,776 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:18,777 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:18,779 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 47 transitions. [2022-03-15 22:19:18,780 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:19,255 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [224161#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 224158#(< j1 M1), 224160#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 224164#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= j1 (+ 2 j2)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 224162#(and (or (< j1 M1) (<= (* 2 C) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))), 224159#(or (< j1 M1) (<= (+ j2 1) M2)), 224163#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 3 j2)))), 224165#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= j1 (+ j2 1)) (not (< (+ 2 j1) M1))) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 224166#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= j1 j2)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))))] [2022-03-15 22:19:19,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:19:19,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:19:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:19:19,256 INFO L87 Difference]: Start difference. First operand 697 states and 1898 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:21,516 INFO L93 Difference]: Finished difference Result 933 states and 2319 transitions. [2022-03-15 22:19:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 22:19:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:19:21,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:21,517 INFO L225 Difference]: With dead ends: 933 [2022-03-15 22:19:21,517 INFO L226 Difference]: Without dead ends: 933 [2022-03-15 22:19:21,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=766, Invalid=5714, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 22:19:21,518 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 197 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:21,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 0 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:19:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-03-15 22:19:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 701. [2022-03-15 22:19:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.7285714285714286) internal successors, (1910), 700 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1910 transitions. [2022-03-15 22:19:21,526 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1910 transitions. Word has length 19 [2022-03-15 22:19:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:21,526 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 1910 transitions. [2022-03-15 22:19:21,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1910 transitions. [2022-03-15 22:19:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:21,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:21,527 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:21,544 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 22:19:21,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:21,744 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:21,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1807258744, now seen corresponding path program 151 times [2022-03-15 22:19:21,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:21,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554680623] [2022-03-15 22:19:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:21,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:21,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:21,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554680623] [2022-03-15 22:19:21,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554680623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:21,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297835544] [2022-03-15 22:19:21,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:19:21,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:21,950 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 22:19:21,950 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 22:19:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:21,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:19:21,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:22,267 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 22:19:22,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:22,520 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 22:19:22,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297835544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:22,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:22,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 32 [2022-03-15 22:19:22,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1783314306] [2022-03-15 22:19:22,520 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:22,521 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:22,523 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 43 transitions. [2022-03-15 22:19:22,523 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:23,031 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [226724#(or (< j1 M1) (<= (+ j2 1) M2)), 226721#(< j1 M1), 226726#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 226722#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 3 j2)))), 226723#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= j1 (+ 2 j2)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 226728#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= j1 j2)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1)))), 226725#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 226727#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= j1 (+ j2 1)) (not (< (+ 2 j1) M1))) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:19:23,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:19:23,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:23,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:19:23,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:19:23,031 INFO L87 Difference]: Start difference. First operand 701 states and 1910 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:25,648 INFO L93 Difference]: Finished difference Result 941 states and 2337 transitions. [2022-03-15 22:19:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 22:19:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:19:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:25,650 INFO L225 Difference]: With dead ends: 941 [2022-03-15 22:19:25,650 INFO L226 Difference]: Without dead ends: 941 [2022-03-15 22:19:25,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=857, Invalid=6453, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 22:19:25,650 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 189 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:25,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 0 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:19:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-15 22:19:25,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 702. [2022-03-15 22:19:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 2.7289586305278175) internal successors, (1913), 701 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1913 transitions. [2022-03-15 22:19:25,659 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1913 transitions. Word has length 19 [2022-03-15 22:19:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:25,660 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1913 transitions. [2022-03-15 22:19:25,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1913 transitions. [2022-03-15 22:19:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:25,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:25,661 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:25,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-15 22:19:25,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:25,877 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:25,877 INFO L85 PathProgramCache]: Analyzing trace with hash -215574636, now seen corresponding path program 152 times [2022-03-15 22:19:25,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:25,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782858597] [2022-03-15 22:19:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:25,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:26,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:26,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782858597] [2022-03-15 22:19:26,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782858597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:26,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579470546] [2022-03-15 22:19:26,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:19:26,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:26,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:26,085 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 22:19:26,086 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 22:19:26,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:19:26,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:19:26,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:26,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:26,515 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 22:19:26,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579470546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:26,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:26,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 32 [2022-03-15 22:19:26,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1688720221] [2022-03-15 22:19:26,516 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:26,516 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:26,519 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 39 transitions. [2022-03-15 22:19:26,519 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:26,797 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [229311#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= j1 j2)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1)))), 229308#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 229309#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= j1 (+ 2 j2)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 229306#(< j1 M1), 229305#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 3 j2)))), 229310#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= j1 (+ j2 1)) (not (< (+ 2 j1) M1))) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 229307#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:19:26,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:19:26,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:19:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:19:26,797 INFO L87 Difference]: Start difference. First operand 702 states and 1913 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 22:19:28,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:28,762 INFO L93 Difference]: Finished difference Result 938 states and 2329 transitions. [2022-03-15 22:19:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 22:19:28,762 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 19 [2022-03-15 22:19:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:28,763 INFO L225 Difference]: With dead ends: 938 [2022-03-15 22:19:28,763 INFO L226 Difference]: Without dead ends: 938 [2022-03-15 22:19:28,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=850, Invalid=6290, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 22:19:28,764 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 207 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:28,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 0 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:19:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-03-15 22:19:28,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 704. [2022-03-15 22:19:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 2.72972972972973) internal successors, (1919), 703 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1919 transitions. [2022-03-15 22:19:28,791 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1919 transitions. Word has length 19 [2022-03-15 22:19:28,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:28,791 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1919 transitions. [2022-03-15 22:19:28,791 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 22:19:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1919 transitions. [2022-03-15 22:19:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:28,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:28,792 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:28,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-15 22:19:29,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:29,024 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:29,024 INFO L85 PathProgramCache]: Analyzing trace with hash -856966648, now seen corresponding path program 153 times [2022-03-15 22:19:29,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:29,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488108128] [2022-03-15 22:19:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:29,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:29,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:29,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488108128] [2022-03-15 22:19:29,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488108128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:29,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202922967] [2022-03-15 22:19:29,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:19:29,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:29,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:29,284 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 22:19:29,284 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 22:19:29,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:19:29,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:29,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:19:29,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:29,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:30,590 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 22:19:30,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202922967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:30,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:30,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:19:30,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2084505962] [2022-03-15 22:19:30,591 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:30,591 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:30,594 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 22:19:30,594 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:30,941 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [231896#(or (< j1 M1) (= counter 0)), 231895#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= 0 j1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= j2 0)) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 231897#(or (< j2 M2) (< j1 M1) (= counter 0)), 231893#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= 2 j1) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 231894#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 1 j1))), 231892#(and (or (not (< j1 M1)) (<= 3 j1)) (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 22:19:30,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:19:30,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:19:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1490, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:19:30,942 INFO L87 Difference]: Start difference. First operand 704 states and 1919 transitions. Second operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22:19:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:35,142 INFO L93 Difference]: Finished difference Result 1162 states and 2778 transitions. [2022-03-15 22:19:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 22:19:35,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22:19:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:35,144 INFO L225 Difference]: With dead ends: 1162 [2022-03-15 22:19:35,144 INFO L226 Difference]: Without dead ends: 1156 [2022-03-15 22:19:35,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=955, Invalid=6527, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 22:19:35,144 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 176 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:35,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 0 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:19:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-03-15 22:19:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 726. [2022-03-15 22:19:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.7448275862068967) internal successors, (1990), 725 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1990 transitions. [2022-03-15 22:19:35,153 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1990 transitions. Word has length 19 [2022-03-15 22:19:35,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:35,153 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1990 transitions. [2022-03-15 22:19:35,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22:19:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1990 transitions. [2022-03-15 22:19:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:35,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:35,154 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:35,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-15 22:19:35,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:35,367 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash 8279312, now seen corresponding path program 154 times [2022-03-15 22:19:35,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:35,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552962993] [2022-03-15 22:19:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:35,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:35,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:35,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552962993] [2022-03-15 22:19:35,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552962993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:35,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517152252] [2022-03-15 22:19:35,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:19:35,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:35,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:35,607 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 22:19:35,608 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 22:19:35,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:19:35,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:35,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 22:19:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:35,884 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 22:19:35,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:36,100 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 22:19:36,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517152252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:36,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:36,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2022-03-15 22:19:36,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157772018] [2022-03-15 22:19:36,101 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:36,101 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:36,104 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:19:36,104 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:36,338 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [234664#(< j2 M2), 234745#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= 0 j1)) (or (not (< (+ 3 j1) M1)) (<= j2 0)) (or (not (< (+ 3 j1) M1)) (= M2 M1)) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 234744#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 1 j1))), 234743#(and (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= 2 j1) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1)))), 234742#(and (or (not (< j1 M1)) (<= 3 j1)) (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= M2 M1)))] [2022-03-15 22:19:36,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:19:36,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:19:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:19:36,339 INFO L87 Difference]: Start difference. First operand 726 states and 1990 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 22:19:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:36,866 INFO L93 Difference]: Finished difference Result 974 states and 2596 transitions. [2022-03-15 22:19:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:19:36,866 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 19 [2022-03-15 22:19:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:36,868 INFO L225 Difference]: With dead ends: 974 [2022-03-15 22:19:36,868 INFO L226 Difference]: Without dead ends: 973 [2022-03-15 22:19:36,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:19:36,868 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:36,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:19:36,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-03-15 22:19:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 728. [2022-03-15 22:19:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 2.7441540577716643) internal successors, (1995), 727 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1995 transitions. [2022-03-15 22:19:36,882 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1995 transitions. Word has length 19 [2022-03-15 22:19:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:36,882 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 1995 transitions. [2022-03-15 22:19:36,882 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 22:19:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1995 transitions. [2022-03-15 22:19:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:36,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:36,883 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:36,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-15 22:19:37,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:37,099 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:37,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1064830266, now seen corresponding path program 155 times [2022-03-15 22:19:37,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:37,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973504311] [2022-03-15 22:19:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:37,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:37,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:37,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973504311] [2022-03-15 22:19:37,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973504311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:37,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674769548] [2022-03-15 22:19:37,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:19:37,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:37,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:37,356 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 22:19:37,357 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 22:19:37,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:19:37,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:37,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:19:37,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:37,724 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 22:19:37,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:19:37,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674769548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:37,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:37,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 32 [2022-03-15 22:19:37,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1174877559] [2022-03-15 22:19:37,964 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:37,964 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:37,967 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 49 transitions. [2022-03-15 22:19:37,967 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:38,750 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [237353#(< j1 M1), 237361#(and (or (<= j1 j2) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= j2 0) (not (<= (+ (* 3 C) counter) 0)) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 237359#(and (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= j2 0) (not (<= (+ C counter) 0))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (<= j1 (+ 2 j2)))), 237356#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 237360#(and (or (<= j1 (+ j2 1)) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= j2 0) (not (<= (+ (* 2 C) counter) 0)) (not (< (+ j1 1) M1))) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 237355#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 237358#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* 3 C) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter))), 237354#(or (< j1 M1) (<= (+ j2 1) M2)), 237357#(and (or (< j1 M1) (<= (* 2 C) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)))] [2022-03-15 22:19:38,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:19:38,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:19:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:19:38,751 INFO L87 Difference]: Start difference. First operand 728 states and 1995 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:40,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:40,295 INFO L93 Difference]: Finished difference Result 895 states and 2311 transitions. [2022-03-15 22:19:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 22:19:40,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:19:40,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:40,301 INFO L225 Difference]: With dead ends: 895 [2022-03-15 22:19:40,301 INFO L226 Difference]: Without dead ends: 895 [2022-03-15 22:19:40,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=498, Invalid=4194, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 22:19:40,302 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:40,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:19:40,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-03-15 22:19:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 735. [2022-03-15 22:19:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.7438692098092643) internal successors, (2014), 734 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2014 transitions. [2022-03-15 22:19:40,309 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2014 transitions. Word has length 19 [2022-03-15 22:19:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:40,309 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2014 transitions. [2022-03-15 22:19:40,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2014 transitions. [2022-03-15 22:19:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:40,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:40,310 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:40,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-03-15 22:19:40,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-15 22:19:40,525 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:40,526 INFO L85 PathProgramCache]: Analyzing trace with hash 417792570, now seen corresponding path program 156 times [2022-03-15 22:19:40,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:40,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758389363] [2022-03-15 22:19:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:40,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:40,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:40,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758389363] [2022-03-15 22:19:40,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758389363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:40,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077268331] [2022-03-15 22:19:40,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:19:40,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:40,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:40,736 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 22:19:40,737 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 22:19:40,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:19:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:40,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:19:40,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:41,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:41,816 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 22:19:41,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077268331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:41,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:41,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:19:41,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [395322423] [2022-03-15 22:19:41,817 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:41,818 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:41,820 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:19:41,820 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:42,055 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [239928#(or (< j2 M2) (< j1 M1) (= counter 0)), 239925#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (= M2 M1))), 239927#(or (< j1 M1) (= counter 0)), 239929#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 239926#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:19:42,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:19:42,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:42,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:19:42,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:19:42,055 INFO L87 Difference]: Start difference. First operand 735 states and 2014 transitions. Second operand has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:19:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:43,803 INFO L93 Difference]: Finished difference Result 1153 states and 2889 transitions. [2022-03-15 22:19:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 22:19:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:19:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:43,805 INFO L225 Difference]: With dead ends: 1153 [2022-03-15 22:19:43,805 INFO L226 Difference]: Without dead ends: 1140 [2022-03-15 22:19:43,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=735, Invalid=4667, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 22:19:43,805 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:43,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:19:43,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-03-15 22:19:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 761. [2022-03-15 22:19:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 2.7342105263157896) internal successors, (2078), 760 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2078 transitions. [2022-03-15 22:19:43,816 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2078 transitions. Word has length 19 [2022-03-15 22:19:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:43,816 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2078 transitions. [2022-03-15 22:19:43,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:19:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2078 transitions. [2022-03-15 22:19:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:43,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:43,817 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:43,833 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 22:19:44,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-15 22:19:44,032 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1951140648, now seen corresponding path program 157 times [2022-03-15 22:19:44,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:44,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946990318] [2022-03-15 22:19:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:44,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:44,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:44,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946990318] [2022-03-15 22:19:44,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946990318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:44,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607866522] [2022-03-15 22:19:44,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:19:44,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:44,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:44,203 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 22:19:44,204 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 22:19:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:19:44,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:44,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:45,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607866522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:45,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:45,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 33 [2022-03-15 22:19:45,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [546933088] [2022-03-15 22:19:45,207 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:45,208 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:45,210 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:19:45,210 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:45,400 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [242814#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (= M2 M1))), 242817#(or (< j2 M2) (< j1 M1) (= counter 0)), 242816#(or (< j1 M1) (= counter 0)), 242818#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 242815#(and (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))))] [2022-03-15 22:19:45,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:19:45,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:45,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:19:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:19:45,401 INFO L87 Difference]: Start difference. First operand 761 states and 2078 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) 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 22:19:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:47,467 INFO L93 Difference]: Finished difference Result 1121 states and 2767 transitions. [2022-03-15 22:19:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 22:19:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) 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 22:19:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:47,468 INFO L225 Difference]: With dead ends: 1121 [2022-03-15 22:19:47,469 INFO L226 Difference]: Without dead ends: 1108 [2022-03-15 22:19:47,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=705, Invalid=5147, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 22:19:47,469 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:47,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:19:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-03-15 22:19:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 763. [2022-03-15 22:19:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 2.732283464566929) internal successors, (2082), 762 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2082 transitions. [2022-03-15 22:19:47,477 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2082 transitions. Word has length 19 [2022-03-15 22:19:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:47,477 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2082 transitions. [2022-03-15 22:19:47,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) 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 22:19:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2082 transitions. [2022-03-15 22:19:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:47,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:47,478 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:47,495 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 22:19:47,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-15 22:19:47,683 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1299245532, now seen corresponding path program 158 times [2022-03-15 22:19:47,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:47,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135165420] [2022-03-15 22:19:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:47,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:47,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:47,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135165420] [2022-03-15 22:19:47,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135165420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:47,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759126188] [2022-03-15 22:19:47,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:19:47,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:47,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:47,968 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 22:19:47,969 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 22:19:47,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:19:47,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:47,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:19:47,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:48,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:49,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759126188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:49,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:49,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:19:49,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [502035750] [2022-03-15 22:19:49,030 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:49,031 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:49,033 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 37 transitions. [2022-03-15 22:19:49,033 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:49,358 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [245685#(or (< j2 M2) (< j1 M1) (= counter 0)), 245688#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 245687#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 245686#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 245684#(or (< j1 M1) (= counter 0)), 245689#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:19:49,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:19:49,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:49,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:19:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:19:49,359 INFO L87 Difference]: Start difference. First operand 763 states and 2082 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 22:19:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:52,146 INFO L93 Difference]: Finished difference Result 1271 states and 3082 transitions. [2022-03-15 22:19:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 22:19:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 22:19:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:52,148 INFO L225 Difference]: With dead ends: 1271 [2022-03-15 22:19:52,148 INFO L226 Difference]: Without dead ends: 1236 [2022-03-15 22:19:52,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=966, Invalid=6866, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 22:19:52,149 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 161 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:52,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 0 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:19:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-03-15 22:19:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 768. [2022-03-15 22:19:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.7314211212516297) internal successors, (2095), 767 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 22:19:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2095 transitions. [2022-03-15 22:19:52,157 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2095 transitions. Word has length 19 [2022-03-15 22:19:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:52,157 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 2095 transitions. [2022-03-15 22:19:52,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 22:19:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2095 transitions. [2022-03-15 22:19:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:52,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:52,158 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:52,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-15 22:19:52,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:52,374 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1195935046, now seen corresponding path program 159 times [2022-03-15 22:19:52,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:52,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836047381] [2022-03-15 22:19:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:52,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:52,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:52,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836047381] [2022-03-15 22:19:52,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836047381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:52,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234087017] [2022-03-15 22:19:52,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:19:52,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:52,599 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 22:19:52,600 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 22:19:52,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:19:52,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:52,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 22:19:52,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:19:53,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:54,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234087017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:54,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:54,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 35 [2022-03-15 22:19:54,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [864844008] [2022-03-15 22:19:54,176 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:54,177 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:54,179 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:19:54,179 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:54,369 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [248737#(< j1 M1), 248738#(or (< j1 M1) (<= (+ j2 1) M2)), 248735#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (= M2 M1))), 248736#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1)))), 248739#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:19:54,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:19:54,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:54,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:19:54,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:19:54,370 INFO L87 Difference]: Start difference. First operand 768 states and 2095 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 22:19:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:55,623 INFO L93 Difference]: Finished difference Result 1149 states and 2850 transitions. [2022-03-15 22:19:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 22:19:55,623 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 22:19:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:55,624 INFO L225 Difference]: With dead ends: 1149 [2022-03-15 22:19:55,625 INFO L226 Difference]: Without dead ends: 1145 [2022-03-15 22:19:55,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=932, Invalid=3358, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 22:19:55,625 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:55,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:19:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-03-15 22:19:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 748. [2022-03-15 22:19:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.718875502008032) internal successors, (2031), 747 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2031 transitions. [2022-03-15 22:19:55,634 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2031 transitions. Word has length 19 [2022-03-15 22:19:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:55,634 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 2031 transitions. [2022-03-15 22:19:55,634 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 22:19:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2031 transitions. [2022-03-15 22:19:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:55,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:55,634 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:55,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-15 22:19:55,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:55,847 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:55,848 INFO L85 PathProgramCache]: Analyzing trace with hash 546875289, now seen corresponding path program 160 times [2022-03-15 22:19:55,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:55,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518724350] [2022-03-15 22:19:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:55,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:56,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:56,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518724350] [2022-03-15 22:19:56,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518724350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:56,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849194935] [2022-03-15 22:19:56,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:19:56,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:56,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:56,336 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 22:19:56,337 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 22:19:56,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:19:56,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:56,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:19:56,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:19:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:19:56,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:19:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:57,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849194935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:19:57,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:19:57,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 12] total 32 [2022-03-15 22:19:57,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1175620594] [2022-03-15 22:19:57,704 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:19:57,719 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:19:57,722 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:19:57,722 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:19:58,184 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [251581#(or (< j2 M2) (< j1 M1) (= counter 0)), 251577#(or (< j1 M1) (= counter 0)), 251580#(and (or (<= j2 0) (<= C 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (<= C 0) (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= j1 j2) (<= C 0) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= j2 0) (not (< (+ 2 j1) M1)) (<= M2 3)) (or (not (<= M2 3)) (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 251579#(and (or (not (<= M2 3)) (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= j2 0) (<= C 0) (not (< (+ j1 1) M1))) (or (<= C 0) (not (< (+ j1 1) M1)) (<= 1 j1)) (or (<= j2 0) (not (< (+ j1 1) M1)) (<= M2 3)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= C 0) (<= j1 (+ j2 1)) (not (< (+ j1 1) M1)))), 251578#(and (or (not (< j1 M1)) (<= 2 j1) (<= C 0)) (or (not (< j1 M1)) (<= j2 0) (<= C 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= j2 0) (<= M2 3)) (or (not (< j1 M1)) (<= j1 (+ 2 j2)) (<= C 0)) (or (not (< j1 M1)) (<= 2 j1) (not (<= M2 3))) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (= M2 M1)))] [2022-03-15 22:19:58,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:19:58,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:19:58,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:19:58,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:19:58,184 INFO L87 Difference]: Start difference. First operand 748 states and 2031 transitions. Second operand has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:19:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:19:59,291 INFO L93 Difference]: Finished difference Result 856 states and 2222 transitions. [2022-03-15 22:19:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:19:59,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:19:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:19:59,292 INFO L225 Difference]: With dead ends: 856 [2022-03-15 22:19:59,292 INFO L226 Difference]: Without dead ends: 848 [2022-03-15 22:19:59,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=359, Invalid=1993, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:19:59,293 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:19:59,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:19:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-03-15 22:19:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 748. [2022-03-15 22:19:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.718875502008032) internal successors, (2031), 747 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:19:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2031 transitions. [2022-03-15 22:19:59,307 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2031 transitions. Word has length 19 [2022-03-15 22:19:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:19:59,307 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 2031 transitions. [2022-03-15 22:19:59,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:19:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2031 transitions. [2022-03-15 22:19:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:19:59,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:19:59,308 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:19:59,325 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 22:19:59,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:59,522 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:19:59,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:19:59,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1927660360, now seen corresponding path program 161 times [2022-03-15 22:19:59,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:19:59,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765834440] [2022-03-15 22:19:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:19:59,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:19:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:19:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:19:59,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:19:59,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765834440] [2022-03-15 22:19:59,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765834440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:19:59,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840977681] [2022-03-15 22:19:59,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:19:59,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:19:59,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:19:59,787 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 22:19:59,788 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 22:19:59,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:19:59,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:19:59,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 22:19:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:00,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:20:00,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840977681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:00,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:00,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 36 [2022-03-15 22:20:00,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1578476829] [2022-03-15 22:20:00,625 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:00,626 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:00,628 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 47 transitions. [2022-03-15 22:20:00,629 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:01,304 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [254100#(or (< j1 M1) (<= (+ j2 1) M2)), 254105#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (+ (* 2 C) 1) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))) (or (< j1 M1) (<= 2 counter) (<= (+ 5 j2) M2))), 254104#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 254101#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 254103#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))), 254102#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 254099#(< j1 M1), 254106#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:20:01,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:20:01,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:01,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:20:01,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:20:01,304 INFO L87 Difference]: Start difference. First operand 748 states and 2031 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 22:20:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:02,492 INFO L93 Difference]: Finished difference Result 864 states and 2264 transitions. [2022-03-15 22:20:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 22:20:02,492 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 19 [2022-03-15 22:20:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:02,493 INFO L225 Difference]: With dead ends: 864 [2022-03-15 22:20:02,493 INFO L226 Difference]: Without dead ends: 864 [2022-03-15 22:20:02,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=437, Invalid=3853, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 22:20:02,494 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:02,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:20:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-03-15 22:20:02,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 753. [2022-03-15 22:20:02,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 2.7180851063829787) internal successors, (2044), 752 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2044 transitions. [2022-03-15 22:20:02,503 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2044 transitions. Word has length 19 [2022-03-15 22:20:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:02,504 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2044 transitions. [2022-03-15 22:20:02,504 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 22:20:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2044 transitions. [2022-03-15 22:20:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:02,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:02,504 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:02,520 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 22:20:02,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:02,719 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:02,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:02,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1280622664, now seen corresponding path program 162 times [2022-03-15 22:20:02,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:02,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335300451] [2022-03-15 22:20:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:02,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:02,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:02,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335300451] [2022-03-15 22:20:02,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335300451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:02,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37739180] [2022-03-15 22:20:02,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:20:02,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:02,933 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 22:20:02,933 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 22:20:02,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:20:02,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:02,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:20:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:03,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:03,983 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 22:20:03,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37739180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:03,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:03,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:20:03,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1636076135] [2022-03-15 22:20:03,983 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:03,984 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:03,986 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 22:20:03,986 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:04,216 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [256664#(or (< j2 M2) (< j1 M1) (= counter 0)), 256666#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 256665#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 256663#(or (< j1 M1) (= counter 0))] [2022-03-15 22:20:04,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:20:04,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:20:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1337, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:20:04,217 INFO L87 Difference]: Start difference. First operand 753 states and 2044 transitions. Second operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 22:20:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:05,926 INFO L93 Difference]: Finished difference Result 1015 states and 2564 transitions. [2022-03-15 22:20:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 22:20:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 22:20:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:05,928 INFO L225 Difference]: With dead ends: 1015 [2022-03-15 22:20:05,928 INFO L226 Difference]: Without dead ends: 1002 [2022-03-15 22:20:05,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=538, Invalid=3752, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 22:20:05,928 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:05,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:20:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-03-15 22:20:05,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 759. [2022-03-15 22:20:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.712401055408971) internal successors, (2056), 758 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2056 transitions. [2022-03-15 22:20:05,936 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2056 transitions. Word has length 19 [2022-03-15 22:20:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:05,936 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2056 transitions. [2022-03-15 22:20:05,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 22:20:05,937 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2056 transitions. [2022-03-15 22:20:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:05,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:05,937 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:05,955 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 22:20:06,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:06,153 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:06,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:06,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1088310554, now seen corresponding path program 163 times [2022-03-15 22:20:06,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:06,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531571788] [2022-03-15 22:20:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:06,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:06,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:06,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531571788] [2022-03-15 22:20:06,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531571788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:06,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639527230] [2022-03-15 22:20:06,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:20:06,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:06,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:06,417 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 22:20:06,418 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 22:20:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:06,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:20:06,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:06,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:07,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639527230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:07,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:07,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 33 [2022-03-15 22:20:07,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [132570816] [2022-03-15 22:20:07,731 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:07,731 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:07,734 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 22:20:07,734 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:07,941 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [259398#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1)))), 259396#(or (< j2 M2) (< j1 M1) (= counter 0)), 259395#(or (< j1 M1) (= counter 0)), 259397#(and (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (= M2 M1)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:20:07,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:20:07,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:07,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:20:07,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:20:07,941 INFO L87 Difference]: Start difference. First operand 759 states and 2056 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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 22:20:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:09,922 INFO L93 Difference]: Finished difference Result 1089 states and 2714 transitions. [2022-03-15 22:20:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 22:20:09,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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 22:20:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:09,923 INFO L225 Difference]: With dead ends: 1089 [2022-03-15 22:20:09,924 INFO L226 Difference]: Without dead ends: 1076 [2022-03-15 22:20:09,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=596, Invalid=4374, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 22:20:09,924 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:09,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:20:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-03-15 22:20:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 768. [2022-03-15 22:20:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.7040417209908734) internal successors, (2074), 767 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2074 transitions. [2022-03-15 22:20:09,933 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2074 transitions. Word has length 19 [2022-03-15 22:20:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:09,933 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 2074 transitions. [2022-03-15 22:20:09,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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 22:20:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2074 transitions. [2022-03-15 22:20:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:09,934 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:09,934 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:09,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:10,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:10,150 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:10,150 INFO L85 PathProgramCache]: Analyzing trace with hash -436415438, now seen corresponding path program 164 times [2022-03-15 22:20:10,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:10,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079974649] [2022-03-15 22:20:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:10,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:10,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:10,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079974649] [2022-03-15 22:20:10,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079974649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:10,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694062236] [2022-03-15 22:20:10,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:20:10,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:10,349 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 22:20:10,349 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 22:20:10,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:20:10,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:10,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:20:10,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:10,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:11,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694062236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:11,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:11,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:20:11,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1335944345] [2022-03-15 22:20:11,261 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:11,261 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:11,264 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 22:20:11,264 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:11,496 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [262235#(or (< j2 M2) (< j1 M1) (= counter 0)), 262234#(or (< j1 M1) (= counter 0)), 262232#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 262236#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 262233#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:20:11,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:20:11,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:20:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:20:11,497 INFO L87 Difference]: Start difference. First operand 768 states and 2074 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 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 22:20:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:13,551 INFO L93 Difference]: Finished difference Result 1199 states and 2939 transitions. [2022-03-15 22:20:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 22:20:13,551 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 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 22:20:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:13,553 INFO L225 Difference]: With dead ends: 1199 [2022-03-15 22:20:13,553 INFO L226 Difference]: Without dead ends: 1169 [2022-03-15 22:20:13,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=855, Invalid=6285, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 22:20:13,553 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:13,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:20:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-03-15 22:20:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 780. [2022-03-15 22:20:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.6970474967907574) internal successors, (2101), 779 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2101 transitions. [2022-03-15 22:20:13,563 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2101 transitions. Word has length 19 [2022-03-15 22:20:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:13,563 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2101 transitions. [2022-03-15 22:20:13,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 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 22:20:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2101 transitions. [2022-03-15 22:20:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:13,564 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:13,564 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:13,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:13,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-03-15 22:20:13,781 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:13,781 INFO L85 PathProgramCache]: Analyzing trace with hash -333104952, now seen corresponding path program 165 times [2022-03-15 22:20:13,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:13,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594324906] [2022-03-15 22:20:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:13,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:13,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:13,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594324906] [2022-03-15 22:20:13,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594324906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:13,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554292129] [2022-03-15 22:20:13,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:20:13,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:13,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:13,924 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 22:20:13,925 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 22:20:13,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:20:13,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:13,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 22:20:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:14,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:15,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554292129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:15,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:15,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13] total 36 [2022-03-15 22:20:15,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2026533267] [2022-03-15 22:20:15,232 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:15,232 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:15,234 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 22:20:15,235 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:15,428 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [265232#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 265229#(< j1 M1), 265231#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 265230#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:20:15,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:20:15,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:15,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:20:15,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1334, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:20:15,429 INFO L87 Difference]: Start difference. First operand 780 states and 2101 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 22:20:16,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:16,313 INFO L93 Difference]: Finished difference Result 1171 states and 2942 transitions. [2022-03-15 22:20:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:20:16,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 22:20:16,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:16,315 INFO L225 Difference]: With dead ends: 1171 [2022-03-15 22:20:16,315 INFO L226 Difference]: Without dead ends: 1167 [2022-03-15 22:20:16,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=839, Invalid=3193, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 22:20:16,316 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:16,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-03-15 22:20:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 815. [2022-03-15 22:20:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 2.7174447174447174) internal successors, (2212), 814 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2212 transitions. [2022-03-15 22:20:16,325 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2212 transitions. Word has length 19 [2022-03-15 22:20:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:16,325 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 2212 transitions. [2022-03-15 22:20:16,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 22:20:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2212 transitions. [2022-03-15 22:20:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:16,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:16,326 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:16,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:16,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-15 22:20:16,535 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1510796280, now seen corresponding path program 166 times [2022-03-15 22:20:16,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:16,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084074635] [2022-03-15 22:20:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:16,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:16,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:16,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084074635] [2022-03-15 22:20:16,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084074635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:16,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686931488] [2022-03-15 22:20:16,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:20:16,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:16,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:16,776 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 22:20:16,777 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 22:20:16,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:20:16,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:16,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:20:16,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:17,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:17,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686931488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:17,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:17,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 32 [2022-03-15 22:20:17,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [930155864] [2022-03-15 22:20:17,745 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:17,746 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:17,748 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 22:20:17,748 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:17,892 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [268222#(or (< j1 M1) (= counter 0)), 268224#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 268223#(or (< j2 M2) (< j1 M1) (= counter 0)), 268225#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:20:17,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:20:17,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:20:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:20:17,893 INFO L87 Difference]: Start difference. First operand 815 states and 2212 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) 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 22:20:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:19,380 INFO L93 Difference]: Finished difference Result 1088 states and 2749 transitions. [2022-03-15 22:20:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 22:20:19,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) 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 22:20:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:19,382 INFO L225 Difference]: With dead ends: 1088 [2022-03-15 22:20:19,382 INFO L226 Difference]: Without dead ends: 1075 [2022-03-15 22:20:19,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=586, Invalid=4244, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 22:20:19,382 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:19,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-03-15 22:20:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 809. [2022-03-15 22:20:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 2.722772277227723) internal successors, (2200), 808 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2200 transitions. [2022-03-15 22:20:19,391 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2200 transitions. Word has length 19 [2022-03-15 22:20:19,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:19,392 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 2200 transitions. [2022-03-15 22:20:19,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) 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 22:20:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2200 transitions. [2022-03-15 22:20:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:19,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:19,393 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:19,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:19,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-15 22:20:19,608 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:19,608 INFO L85 PathProgramCache]: Analyzing trace with hash -858901164, now seen corresponding path program 167 times [2022-03-15 22:20:19,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:19,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874885585] [2022-03-15 22:20:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:19,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:19,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:19,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874885585] [2022-03-15 22:20:19,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874885585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:19,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135828563] [2022-03-15 22:20:19,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:20:19,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:19,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:19,774 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 22:20:19,775 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 22:20:19,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:20:19,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:19,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:20:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:20,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:20,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135828563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:20,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:20,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 33 [2022-03-15 22:20:20,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [438625894] [2022-03-15 22:20:20,604 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:20,605 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:20,607 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 22:20:20,607 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:20,839 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [271143#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 271140#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 271142#(or (< j2 M2) (< j1 M1) (= counter 0)), 271141#(or (< j1 M1) (= counter 0)), 271139#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:20:20,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:20:20,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:20:20,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:20:20,840 INFO L87 Difference]: Start difference. First operand 809 states and 2200 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:22,503 INFO L93 Difference]: Finished difference Result 1187 states and 2952 transitions. [2022-03-15 22:20:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 22:20:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:20:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:22,505 INFO L225 Difference]: With dead ends: 1187 [2022-03-15 22:20:22,505 INFO L226 Difference]: Without dead ends: 1157 [2022-03-15 22:20:22,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=773, Invalid=5389, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 22:20:22,505 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:22,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-03-15 22:20:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 809. [2022-03-15 22:20:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 2.719059405940594) internal successors, (2197), 808 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2197 transitions. [2022-03-15 22:20:22,514 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2197 transitions. Word has length 19 [2022-03-15 22:20:22,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:22,514 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 2197 transitions. [2022-03-15 22:20:22,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:22,515 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2197 transitions. [2022-03-15 22:20:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:22,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:22,516 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:22,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:22,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-15 22:20:22,730 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash -755590678, now seen corresponding path program 168 times [2022-03-15 22:20:22,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:22,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90259307] [2022-03-15 22:20:22,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:22,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:22,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:22,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90259307] [2022-03-15 22:20:22,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90259307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:22,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432231685] [2022-03-15 22:20:22,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:20:22,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:22,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:22,866 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 22:20:22,866 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 22:20:22,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:20:22,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 22:20:22,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:20:23,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:24,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432231685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:24,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:24,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 35 [2022-03-15 22:20:24,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1839329262] [2022-03-15 22:20:24,241 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:24,241 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:24,243 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 22:20:24,243 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:24,440 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [274174#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 274172#(or (< j1 M1) (<= (+ j2 1) M2)), 274173#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 274171#(< j1 M1)] [2022-03-15 22:20:24,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:20:24,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:24,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:20:24,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1269, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:20:24,441 INFO L87 Difference]: Start difference. First operand 809 states and 2197 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 22:20:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:25,513 INFO L93 Difference]: Finished difference Result 1251 states and 3146 transitions. [2022-03-15 22:20:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:20:25,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 22:20:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:25,515 INFO L225 Difference]: With dead ends: 1251 [2022-03-15 22:20:25,515 INFO L226 Difference]: Without dead ends: 1247 [2022-03-15 22:20:25,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=814, Invalid=2968, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 22:20:25,516 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:25,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-03-15 22:20:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 814. [2022-03-15 22:20:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.7207872078720787) internal successors, (2212), 813 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2212 transitions. [2022-03-15 22:20:25,525 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2212 transitions. Word has length 19 [2022-03-15 22:20:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:25,525 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 2212 transitions. [2022-03-15 22:20:25,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 22:20:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2212 transitions. [2022-03-15 22:20:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:25,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:25,526 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:25,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:25,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-15 22:20:25,742 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash 987219657, now seen corresponding path program 169 times [2022-03-15 22:20:25,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:25,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347163217] [2022-03-15 22:20:25,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:25,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:25,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:25,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347163217] [2022-03-15 22:20:25,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347163217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:25,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203020333] [2022-03-15 22:20:25,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:20:25,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:25,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:25,953 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 22:20:25,956 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 22:20:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:20:25,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:20:26,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:26,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203020333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:26,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:26,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 12] total 32 [2022-03-15 22:20:26,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [921727549] [2022-03-15 22:20:26,961 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:26,962 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:26,964 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 22:20:26,964 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:27,119 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [277240#(or (< j1 M1) (= counter 0)), 277243#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 277242#(or (< j2 M2) (< j1 M1) (= counter 0)), 277241#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= 1 j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:20:27,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:20:27,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:27,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:20:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:20:27,120 INFO L87 Difference]: Start difference. First operand 814 states and 2212 transitions. Second operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 22:20:27,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:27,776 INFO L93 Difference]: Finished difference Result 890 states and 2341 transitions. [2022-03-15 22:20:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:20:27,776 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 22:20:27,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:27,778 INFO L225 Difference]: With dead ends: 890 [2022-03-15 22:20:27,778 INFO L226 Difference]: Without dead ends: 877 [2022-03-15 22:20:27,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 22:20:27,778 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:27,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:20:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-03-15 22:20:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 815. [2022-03-15 22:20:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 2.7199017199017197) internal successors, (2214), 814 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2214 transitions. [2022-03-15 22:20:27,789 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2214 transitions. Word has length 19 [2022-03-15 22:20:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:27,789 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 2214 transitions. [2022-03-15 22:20:27,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 22:20:27,790 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2214 transitions. [2022-03-15 22:20:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:27,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:27,790 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:27,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:28,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:28,006 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2135492152, now seen corresponding path program 170 times [2022-03-15 22:20:28,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:28,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745024754] [2022-03-15 22:20:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:28,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:28,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:28,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745024754] [2022-03-15 22:20:28,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745024754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:28,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813511039] [2022-03-15 22:20:28,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:20:28,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:28,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:28,192 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 22:20:28,193 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 22:20:28,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:20:28,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:20:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:28,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:29,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813511039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:29,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:29,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:20:29,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [958385759] [2022-03-15 22:20:29,005 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:29,005 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:29,008 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 39 transitions. [2022-03-15 22:20:29,008 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:29,329 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [279944#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 279947#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2))), 279946#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 279942#(or (< j1 M1) (= counter 0)), 279945#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 279943#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:20:29,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:20:29,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:20:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1495, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:20:29,330 INFO L87 Difference]: Start difference. First operand 815 states and 2214 transitions. Second operand has 22 states, 21 states have (on average 1.6666666666666667) 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 22:20:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:31,493 INFO L93 Difference]: Finished difference Result 1212 states and 3000 transitions. [2022-03-15 22:20:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 22:20:31,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.6666666666666667) 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 19 [2022-03-15 22:20:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:31,495 INFO L225 Difference]: With dead ends: 1212 [2022-03-15 22:20:31,495 INFO L226 Difference]: Without dead ends: 1174 [2022-03-15 22:20:31,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=894, Invalid=6416, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 22:20:31,495 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 115 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:31,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 0 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:20:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-03-15 22:20:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 814. [2022-03-15 22:20:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.7146371463714636) internal successors, (2207), 813 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2207 transitions. [2022-03-15 22:20:31,505 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2207 transitions. Word has length 19 [2022-03-15 22:20:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:31,505 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 2207 transitions. [2022-03-15 22:20:31,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.6666666666666667) 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 22:20:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2207 transitions. [2022-03-15 22:20:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:31,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:31,506 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:31,523 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 22:20:31,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:31,721 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:31,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:31,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1170443400, now seen corresponding path program 171 times [2022-03-15 22:20:31,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:31,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561487609] [2022-03-15 22:20:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:31,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:31,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:31,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561487609] [2022-03-15 22:20:31,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561487609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:31,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319912280] [2022-03-15 22:20:31,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:20:31,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:31,934 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 22:20:31,934 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 22:20:31,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:20:31,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:31,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 22:20:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:32,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:33,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319912280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:33,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:33,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 35 [2022-03-15 22:20:33,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1845246251] [2022-03-15 22:20:33,359 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:33,359 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:33,362 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 22:20:33,362 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:33,551 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [283023#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 283020#(< j1 M1), 283021#(or (< j1 M1) (<= (+ j2 1) M2)), 283022#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:20:33,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:20:33,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:33,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:20:33,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:20:33,552 INFO L87 Difference]: Start difference. First operand 814 states and 2207 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 22:20:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:34,075 INFO L93 Difference]: Finished difference Result 1099 states and 2799 transitions. [2022-03-15 22:20:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:20:34,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 22:20:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:34,077 INFO L225 Difference]: With dead ends: 1099 [2022-03-15 22:20:34,077 INFO L226 Difference]: Without dead ends: 1099 [2022-03-15 22:20:34,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=557, Invalid=2199, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:20:34,077 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:34,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:20:34,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-03-15 22:20:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 814. [2022-03-15 22:20:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.7121771217712176) internal successors, (2205), 813 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2205 transitions. [2022-03-15 22:20:34,086 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2205 transitions. Word has length 19 [2022-03-15 22:20:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:34,087 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 2205 transitions. [2022-03-15 22:20:34,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 22:20:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2205 transitions. [2022-03-15 22:20:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:34,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:34,088 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:34,106 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 22:20:34,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-03-15 22:20:34,304 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1381713561, now seen corresponding path program 172 times [2022-03-15 22:20:34,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:34,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89584927] [2022-03-15 22:20:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:34,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:34,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:34,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89584927] [2022-03-15 22:20:34,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89584927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:34,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757484496] [2022-03-15 22:20:34,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:20:34,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:34,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:34,566 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 22:20:34,567 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 22:20:34,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:20:34,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:34,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:20:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:20:34,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:35,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757484496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:35,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:35,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 12] total 32 [2022-03-15 22:20:35,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [925215704] [2022-03-15 22:20:35,696 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:35,697 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:35,699 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 22:20:35,699 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:35,853 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [285920#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= 1 j1)) (or (not (< j1 M1)) (<= C counter))), 285919#(or (< j1 M1) (= counter 0)), 285921#(or (< j2 M2) (< j1 M1) (= counter 0)), 285922#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:20:35,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:20:35,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:20:35,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:20:35,854 INFO L87 Difference]: Start difference. First operand 814 states and 2205 transitions. Second operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 22:20:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:36,505 INFO L93 Difference]: Finished difference Result 906 states and 2366 transitions. [2022-03-15 22:20:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:20:36,505 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 22:20:36,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:36,506 INFO L225 Difference]: With dead ends: 906 [2022-03-15 22:20:36,507 INFO L226 Difference]: Without dead ends: 893 [2022-03-15 22:20:36,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=462, Invalid=2508, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 22:20:36,507 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:36,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-03-15 22:20:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 822. [2022-03-15 22:20:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 2.705237515225335) internal successors, (2221), 821 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2221 transitions. [2022-03-15 22:20:36,516 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2221 transitions. Word has length 19 [2022-03-15 22:20:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:36,516 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 2221 transitions. [2022-03-15 22:20:36,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 22:20:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2221 transitions. [2022-03-15 22:20:36,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:36,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:36,517 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:36,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:36,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:36,731 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash -533304940, now seen corresponding path program 173 times [2022-03-15 22:20:36,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:36,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105072191] [2022-03-15 22:20:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:36,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:36,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:36,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105072191] [2022-03-15 22:20:36,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105072191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:36,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693321012] [2022-03-15 22:20:36,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:20:36,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:36,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:36,928 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 22:20:36,947 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 22:20:36,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:20:36,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:36,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 22:20:36,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:20:37,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:38,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693321012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:38,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:38,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 37 [2022-03-15 22:20:38,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2084581737] [2022-03-15 22:20:38,569 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:38,569 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:38,572 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 22:20:38,572 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:38,740 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [288657#(or (< j1 M1) (<= (+ 2 j2) M2)), 288655#(< j1 M1), 288656#(or (< j1 M1) (<= (+ j2 1) M2)), 288654#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 288653#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:20:38,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:20:38,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:20:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:20:38,741 INFO L87 Difference]: Start difference. First operand 822 states and 2221 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:39,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:39,242 INFO L93 Difference]: Finished difference Result 1127 states and 2846 transitions. [2022-03-15 22:20:39,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:20:39,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:20:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:39,244 INFO L225 Difference]: With dead ends: 1127 [2022-03-15 22:20:39,244 INFO L226 Difference]: Without dead ends: 1127 [2022-03-15 22:20:39,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=690, Invalid=2850, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:20:39,245 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:39,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:20:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-03-15 22:20:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 830. [2022-03-15 22:20:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.7080820265379977) internal successors, (2245), 829 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2245 transitions. [2022-03-15 22:20:39,254 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2245 transitions. Word has length 19 [2022-03-15 22:20:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:39,255 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2245 transitions. [2022-03-15 22:20:39,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2245 transitions. [2022-03-15 22:20:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:39,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:39,256 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:39,271 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 22:20:39,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:39,462 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:39,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:39,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1389377798, now seen corresponding path program 174 times [2022-03-15 22:20:39,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:39,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768326140] [2022-03-15 22:20:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:39,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:39,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:39,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768326140] [2022-03-15 22:20:39,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768326140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:39,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564950519] [2022-03-15 22:20:39,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:20:39,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:39,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:39,682 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 22:20:39,682 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 22:20:39,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:20:39,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:39,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:20:39,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:39,995 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 22:20:39,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:40,198 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 22:20:40,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564950519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:40,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:40,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 33 [2022-03-15 22:20:40,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [129694245] [2022-03-15 22:20:40,198 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:40,199 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:40,202 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 45 transitions. [2022-03-15 22:20:40,202 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:40,650 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [291626#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= 3 counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= (+ (* 2 C) 1) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))), 291624#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 291627#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 291622#(or (< j1 M1) (<= (+ j2 1) M2)), 291621#(< j1 M1), 291625#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2))), 291623#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:20:40,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:20:40,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:20:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:20:40,651 INFO L87 Difference]: Start difference. First operand 830 states and 2245 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 22:20:41,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:41,197 INFO L93 Difference]: Finished difference Result 874 states and 2343 transitions. [2022-03-15 22:20:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:20:41,197 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 19 [2022-03-15 22:20:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:41,198 INFO L225 Difference]: With dead ends: 874 [2022-03-15 22:20:41,198 INFO L226 Difference]: Without dead ends: 874 [2022-03-15 22:20:41,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=287, Invalid=2365, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 22:20:41,199 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:41,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-15 22:20:41,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 834. [2022-03-15 22:20:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 2.709483793517407) internal successors, (2257), 833 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2257 transitions. [2022-03-15 22:20:41,208 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2257 transitions. Word has length 19 [2022-03-15 22:20:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:41,209 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 2257 transitions. [2022-03-15 22:20:41,209 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 22:20:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2257 transitions. [2022-03-15 22:20:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:41,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:41,210 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:41,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:41,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-03-15 22:20:41,426 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash -789307386, now seen corresponding path program 175 times [2022-03-15 22:20:41,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:41,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588780879] [2022-03-15 22:20:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:41,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:41,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:41,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588780879] [2022-03-15 22:20:41,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588780879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:41,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137843686] [2022-03-15 22:20:41,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:20:41,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:41,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:41,709 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 22:20:41,710 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 22:20:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:41,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:20:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:41,990 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 22:20:41,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:20:42,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137843686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:42,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:42,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 30 [2022-03-15 22:20:42,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [486111127] [2022-03-15 22:20:42,149 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:42,149 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:42,152 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 22:20:42,152 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:42,475 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [294333#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 294332#(or (< j1 M1) (<= (+ j2 1) M2)), 294335#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2))), 294336#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 294334#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 294331#(< j1 M1)] [2022-03-15 22:20:42,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:20:42,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:42,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:20:42,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:20:42,475 INFO L87 Difference]: Start difference. First operand 834 states and 2257 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:42,925 INFO L93 Difference]: Finished difference Result 875 states and 2348 transitions. [2022-03-15 22:20:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:20:42,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:20:42,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:42,927 INFO L225 Difference]: With dead ends: 875 [2022-03-15 22:20:42,927 INFO L226 Difference]: Without dead ends: 874 [2022-03-15 22:20:42,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=1929, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:20:42,928 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:42,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-15 22:20:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 841. [2022-03-15 22:20:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.711904761904762) internal successors, (2278), 840 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2278 transitions. [2022-03-15 22:20:42,937 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2278 transitions. Word has length 19 [2022-03-15 22:20:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:42,938 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2278 transitions. [2022-03-15 22:20:42,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2278 transitions. [2022-03-15 22:20:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:42,938 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:42,939 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:42,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:43,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:43,151 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1308259706, now seen corresponding path program 176 times [2022-03-15 22:20:43,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:43,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216111344] [2022-03-15 22:20:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:43,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:43,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:43,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216111344] [2022-03-15 22:20:43,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216111344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:43,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814025133] [2022-03-15 22:20:43,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:20:43,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:43,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:43,349 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 22:20:43,349 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 22:20:43,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:20:43,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:20:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:43,812 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 22:20:43,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:20:44,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814025133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:44,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:44,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 32 [2022-03-15 22:20:44,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [705180828] [2022-03-15 22:20:44,211 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:44,212 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:44,214 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 37 transitions. [2022-03-15 22:20:44,214 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:44,565 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [297056#(or (< j1 M1) (<= (+ j2 1) M2)), 297058#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 297057#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 297055#(< j1 M1), 297059#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)))] [2022-03-15 22:20:44,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:20:44,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:44,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:20:44,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:20:44,566 INFO L87 Difference]: Start difference. First operand 841 states and 2278 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 22:20:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:45,149 INFO L93 Difference]: Finished difference Result 878 states and 2360 transitions. [2022-03-15 22:20:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:20:45,149 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 19 [2022-03-15 22:20:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:45,150 INFO L225 Difference]: With dead ends: 878 [2022-03-15 22:20:45,150 INFO L226 Difference]: Without dead ends: 877 [2022-03-15 22:20:45,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=264, Invalid=2088, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:20:45,151 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:45,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:45,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-03-15 22:20:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 845. [2022-03-15 22:20:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.713270142180095) internal successors, (2290), 844 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2290 transitions. [2022-03-15 22:20:45,159 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2290 transitions. Word has length 19 [2022-03-15 22:20:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:45,159 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2290 transitions. [2022-03-15 22:20:45,160 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 22:20:45,160 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2290 transitions. [2022-03-15 22:20:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:45,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:45,160 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:45,176 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 22:20:45,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:45,376 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:45,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:45,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1395023482, now seen corresponding path program 177 times [2022-03-15 22:20:45,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:45,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435980132] [2022-03-15 22:20:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:45,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:45,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:45,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435980132] [2022-03-15 22:20:45,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435980132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:45,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737756755] [2022-03-15 22:20:45,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:20:45,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:45,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:45,578 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 22:20:45,579 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 22:20:45,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:20:45,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:45,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:20:45,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:45,897 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 22:20:45,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:46,074 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 22:20:46,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737756755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:46,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:46,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 32 [2022-03-15 22:20:46,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [271413834] [2022-03-15 22:20:46,074 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:46,075 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:46,077 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:20:46,077 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:46,226 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [299793#(or (< j1 M1) (<= (+ j2 1) M2)), 299791#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 299792#(< j1 M1), 299794#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:20:46,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:20:46,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:20:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:20:46,226 INFO L87 Difference]: Start difference. First operand 845 states and 2290 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:20:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:46,806 INFO L93 Difference]: Finished difference Result 878 states and 2363 transitions. [2022-03-15 22:20:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:20:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:20:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:46,807 INFO L225 Difference]: With dead ends: 878 [2022-03-15 22:20:46,807 INFO L226 Difference]: Without dead ends: 877 [2022-03-15 22:20:46,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=2357, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 22:20:46,808 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:46,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-03-15 22:20:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 849. [2022-03-15 22:20:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 2.714622641509434) internal successors, (2302), 848 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 22:20:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2302 transitions. [2022-03-15 22:20:46,817 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2302 transitions. Word has length 19 [2022-03-15 22:20:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:46,817 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 2302 transitions. [2022-03-15 22:20:46,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:20:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2302 transitions. [2022-03-15 22:20:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:46,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:46,818 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:46,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:47,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:47,019 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:47,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2036415494, now seen corresponding path program 178 times [2022-03-15 22:20:47,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:47,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64146021] [2022-03-15 22:20:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:47,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:47,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:47,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64146021] [2022-03-15 22:20:47,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64146021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:47,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647367098] [2022-03-15 22:20:47,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:20:47,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:47,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:47,328 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 22:20:47,329 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 22:20:47,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:20:47,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:47,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:20:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:47,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:48,718 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 22:20:48,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647367098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:48,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:48,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:20:48,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [212047775] [2022-03-15 22:20:48,718 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:48,719 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:48,721 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 22:20:48,721 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:48,891 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [302546#(or (< j2 M2) (< j1 M1) (= counter 0)), 302545#(or (< j1 M1) (= counter 0)), 302547#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:20:48,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:20:48,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:48,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:20:48,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:20:48,892 INFO L87 Difference]: Start difference. First operand 849 states and 2302 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:20:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:50,325 INFO L93 Difference]: Finished difference Result 994 states and 2627 transitions. [2022-03-15 22:20:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 22:20:50,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:20:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:50,327 INFO L225 Difference]: With dead ends: 994 [2022-03-15 22:20:50,327 INFO L226 Difference]: Without dead ends: 990 [2022-03-15 22:20:50,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=532, Invalid=3628, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:20:50,328 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:50,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-03-15 22:20:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 867. [2022-03-15 22:20:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 2.720554272517321) internal successors, (2356), 866 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2356 transitions. [2022-03-15 22:20:50,337 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2356 transitions. Word has length 19 [2022-03-15 22:20:50,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:50,337 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 2356 transitions. [2022-03-15 22:20:50,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:20:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2356 transitions. [2022-03-15 22:20:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:50,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:50,338 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:50,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:50,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-15 22:20:50,543 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:50,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:50,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1171169534, now seen corresponding path program 179 times [2022-03-15 22:20:50,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:50,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812752774] [2022-03-15 22:20:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:50,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:50,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:50,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812752774] [2022-03-15 22:20:50,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812752774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:50,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445015801] [2022-03-15 22:20:50,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:20:50,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:50,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:50,746 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 22:20:50,747 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 22:20:50,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:20:50,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 22:20:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:51,616 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 22:20:51,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:52,138 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 22:20:52,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445015801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:52,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:52,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2022-03-15 22:20:52,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [544372390] [2022-03-15 22:20:52,138 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:52,139 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:52,141 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 22:20:52,141 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:52,227 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [305476#(< j2 M2), 305477#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:20:52,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:20:52,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:20:52,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:20:52,228 INFO L87 Difference]: Start difference. First operand 867 states and 2356 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22:20:52,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:52,893 INFO L93 Difference]: Finished difference Result 1048 states and 2781 transitions. [2022-03-15 22:20:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:20:52,894 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22:20:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:52,895 INFO L225 Difference]: With dead ends: 1048 [2022-03-15 22:20:52,895 INFO L226 Difference]: Without dead ends: 1047 [2022-03-15 22:20:52,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=435, Invalid=3105, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:20:52,895 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:52,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:20:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-03-15 22:20:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 868. [2022-03-15 22:20:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.7197231833910034) internal successors, (2358), 867 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2358 transitions. [2022-03-15 22:20:52,905 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2358 transitions. Word has length 19 [2022-03-15 22:20:52,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:52,905 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2358 transitions. [2022-03-15 22:20:52,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22:20:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2358 transitions. [2022-03-15 22:20:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:52,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:52,906 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:52,922 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 22:20:53,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:53,119 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:53,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:53,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1136726692, now seen corresponding path program 180 times [2022-03-15 22:20:53,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:53,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047806690] [2022-03-15 22:20:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:53,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:53,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:53,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047806690] [2022-03-15 22:20:53,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047806690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:53,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824025995] [2022-03-15 22:20:53,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:20:53,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:53,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:53,315 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 22:20:53,316 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 22:20:53,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:20:53,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:20:53,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:53,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:20:54,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824025995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:54,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:54,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 31 [2022-03-15 22:20:54,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1119242713] [2022-03-15 22:20:54,047 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:54,047 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:54,050 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 22:20:54,050 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:54,385 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [308442#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2))), 308438#(< j1 M1), 308443#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 308441#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 308439#(or (< j1 M1) (<= (+ j2 1) M2)), 308440#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:20:54,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:20:54,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:54,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:20:54,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:20:54,385 INFO L87 Difference]: Start difference. First operand 868 states and 2358 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:55,108 INFO L93 Difference]: Finished difference Result 927 states and 2491 transitions. [2022-03-15 22:20:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:20:55,108 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:20:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:55,109 INFO L225 Difference]: With dead ends: 927 [2022-03-15 22:20:55,110 INFO L226 Difference]: Without dead ends: 926 [2022-03-15 22:20:55,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 15 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=262, Invalid=2390, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 22:20:55,110 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:55,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:20:55,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-03-15 22:20:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 879. [2022-03-15 22:20:55,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.718678815489749) internal successors, (2387), 878 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2387 transitions. [2022-03-15 22:20:55,119 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2387 transitions. Word has length 19 [2022-03-15 22:20:55,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:55,119 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 2387 transitions. [2022-03-15 22:20:55,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2387 transitions. [2022-03-15 22:20:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:55,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:55,120 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:55,137 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 22:20:55,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:55,335 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:55,335 INFO L85 PathProgramCache]: Analyzing trace with hash 531010596, now seen corresponding path program 181 times [2022-03-15 22:20:55,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:55,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740368520] [2022-03-15 22:20:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:55,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:55,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:55,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740368520] [2022-03-15 22:20:55,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740368520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:55,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279924240] [2022-03-15 22:20:55,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:20:55,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:55,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:55,513 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 22:20:55,513 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 22:20:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:20:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:55,813 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 22:20:55,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:20:55,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279924240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:55,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:55,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 8] total 30 [2022-03-15 22:20:55,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1144745314] [2022-03-15 22:20:55,969 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:55,970 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:55,972 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:20:55,972 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:56,113 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [311297#(< j1 M1), 311299#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 311298#(or (< j1 M1) (<= (+ j2 1) M2)), 311296#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:20:56,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:20:56,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:56,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:20:56,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:20:56,113 INFO L87 Difference]: Start difference. First operand 879 states and 2387 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:20:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:56,808 INFO L93 Difference]: Finished difference Result 933 states and 2494 transitions. [2022-03-15 22:20:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:20:56,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:20:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:56,810 INFO L225 Difference]: With dead ends: 933 [2022-03-15 22:20:56,810 INFO L226 Difference]: Without dead ends: 932 [2022-03-15 22:20:56,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=2480, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:20:56,810 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:56,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-03-15 22:20:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 879. [2022-03-15 22:20:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.716400911161731) internal successors, (2385), 878 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2385 transitions. [2022-03-15 22:20:56,819 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2385 transitions. Word has length 19 [2022-03-15 22:20:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:56,819 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 2385 transitions. [2022-03-15 22:20:56,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:20:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2385 transitions. [2022-03-15 22:20:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:56,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:56,820 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:56,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-15 22:20:57,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-03-15 22:20:57,035 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:57,035 INFO L85 PathProgramCache]: Analyzing trace with hash -110381416, now seen corresponding path program 182 times [2022-03-15 22:20:57,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:57,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325155074] [2022-03-15 22:20:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:57,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:57,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:57,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325155074] [2022-03-15 22:20:57,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325155074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:57,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763498223] [2022-03-15 22:20:57,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:20:57,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:57,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:57,212 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 22:20:57,213 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 22:20:57,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:20:57,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:57,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:20:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:57,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:20:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:58,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763498223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:20:58,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:20:58,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 33 [2022-03-15 22:20:58,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [783943338] [2022-03-15 22:20:58,145 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:20:58,146 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:20:58,148 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 22:20:58,148 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:20:58,248 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [314171#(or (< j2 M2) (< j1 M1) (= counter 0)), 314170#(or (< j1 M1) (= counter 0)), 314172#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:20:58,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:20:58,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:20:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:20:58,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:20:58,249 INFO L87 Difference]: Start difference. First operand 879 states and 2385 transitions. Second operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:20:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:20:59,035 INFO L93 Difference]: Finished difference Result 1030 states and 2698 transitions. [2022-03-15 22:20:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:20:59,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:20:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:20:59,036 INFO L225 Difference]: With dead ends: 1030 [2022-03-15 22:20:59,036 INFO L226 Difference]: Without dead ends: 1026 [2022-03-15 22:20:59,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=343, Invalid=2737, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 22:20:59,037 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:20:59,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:20:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-03-15 22:20:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 889. [2022-03-15 22:20:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.7195945945945947) internal successors, (2415), 888 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:20:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2415 transitions. [2022-03-15 22:20:59,046 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2415 transitions. Word has length 19 [2022-03-15 22:20:59,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:20:59,046 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2415 transitions. [2022-03-15 22:20:59,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:20:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2415 transitions. [2022-03-15 22:20:59,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:20:59,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:20:59,047 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:20:59,065 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 22:20:59,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:59,259 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:20:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:20:59,259 INFO L85 PathProgramCache]: Analyzing trace with hash 754864544, now seen corresponding path program 183 times [2022-03-15 22:20:59,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:20:59,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415321246] [2022-03-15 22:20:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:20:59,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:20:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:20:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:20:59,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:20:59,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415321246] [2022-03-15 22:20:59,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415321246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:20:59,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17754011] [2022-03-15 22:20:59,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:20:59,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:20:59,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:20:59,479 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 22:20:59,480 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 22:20:59,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:20:59,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:20:59,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:20:59,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:20:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:20:59,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:21:00,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17754011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:00,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:00,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 28 [2022-03-15 22:21:00,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1712491623] [2022-03-15 22:21:00,082 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:00,082 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:00,084 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 22:21:00,084 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:00,152 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [317079#(< j2 M2), 317154#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:21:00,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:21:00,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:00,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:21:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:21:00,153 INFO L87 Difference]: Start difference. First operand 889 states and 2415 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 22:21:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:00,747 INFO L93 Difference]: Finished difference Result 1180 states and 3114 transitions. [2022-03-15 22:21:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:21:00,747 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 19 [2022-03-15 22:21:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:00,749 INFO L225 Difference]: With dead ends: 1180 [2022-03-15 22:21:00,749 INFO L226 Difference]: Without dead ends: 1179 [2022-03-15 22:21:00,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=386, Invalid=2064, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:21:00,750 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:00,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-03-15 22:21:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 892. [2022-03-15 22:21:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.7205387205387206) internal successors, (2424), 891 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2424 transitions. [2022-03-15 22:21:00,762 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2424 transitions. Word has length 19 [2022-03-15 22:21:00,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:00,763 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 2424 transitions. [2022-03-15 22:21:00,763 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 22:21:00,763 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2424 transitions. [2022-03-15 22:21:00,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:00,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:00,764 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:00,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:00,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:00,980 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:00,981 INFO L85 PathProgramCache]: Analyzing trace with hash -660224667, now seen corresponding path program 184 times [2022-03-15 22:21:00,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:00,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932189320] [2022-03-15 22:21:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:00,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:01,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:01,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932189320] [2022-03-15 22:21:01,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932189320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:01,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315178446] [2022-03-15 22:21:01,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:21:01,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:01,281 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 22:21:01,282 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 22:21:01,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:21:01,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:01,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 22:21:01,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:02,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:02,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315178446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:02,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:02,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2022-03-15 22:21:02,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [41214648] [2022-03-15 22:21:02,592 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:02,593 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:02,595 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 22:21:02,595 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:02,875 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [320308#(or (< j1 M1) (<= (+ j2 1) M2)), 320310#(or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 320309#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 320311#(or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2)), 320312#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 320307#(< j1 M1)] [2022-03-15 22:21:02,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:21:02,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:02,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:21:02,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1725, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:21:02,876 INFO L87 Difference]: Start difference. First operand 892 states and 2424 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:03,604 INFO L93 Difference]: Finished difference Result 931 states and 2493 transitions. [2022-03-15 22:21:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:21:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:21:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:03,606 INFO L225 Difference]: With dead ends: 931 [2022-03-15 22:21:03,606 INFO L226 Difference]: Without dead ends: 921 [2022-03-15 22:21:03,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=552, Invalid=3480, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 22:21:03,606 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:03,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-03-15 22:21:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 891. [2022-03-15 22:21:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.7134831460674156) internal successors, (2415), 890 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2415 transitions. [2022-03-15 22:21:03,621 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2415 transitions. Word has length 19 [2022-03-15 22:21:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:03,622 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2415 transitions. [2022-03-15 22:21:03,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:03,622 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2415 transitions. [2022-03-15 22:21:03,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:03,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:03,623 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:03,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:03,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:03,835 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1633855930, now seen corresponding path program 185 times [2022-03-15 22:21:03,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:03,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834443219] [2022-03-15 22:21:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:03,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:04,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:04,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834443219] [2022-03-15 22:21:04,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834443219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:04,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273655228] [2022-03-15 22:21:04,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:21:04,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:04,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:04,030 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 22:21:04,031 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 22:21:04,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:21:04,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:04,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:21:04,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:04,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:21:04,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273655228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:04,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:04,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 32 [2022-03-15 22:21:04,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [646169280] [2022-03-15 22:21:04,647 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:04,648 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:04,650 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 37 transitions. [2022-03-15 22:21:04,650 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:04,872 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [323203#(< j1 M1), 323206#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 323204#(or (< j1 M1) (<= (+ j2 1) M2)), 323207#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 323205#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:21:04,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:21:04,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:04,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:21:04,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:21:04,872 INFO L87 Difference]: Start difference. First operand 891 states and 2415 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 22:21:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:05,747 INFO L93 Difference]: Finished difference Result 968 states and 2584 transitions. [2022-03-15 22:21:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:21:05,748 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 19 [2022-03-15 22:21:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:05,749 INFO L225 Difference]: With dead ends: 968 [2022-03-15 22:21:05,749 INFO L226 Difference]: Without dead ends: 967 [2022-03-15 22:21:05,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=340, Invalid=3082, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 22:21:05,749 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:05,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:05,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-03-15 22:21:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 901. [2022-03-15 22:21:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.716666666666667) internal successors, (2445), 900 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 2445 transitions. [2022-03-15 22:21:05,772 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 2445 transitions. Word has length 19 [2022-03-15 22:21:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:05,772 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 2445 transitions. [2022-03-15 22:21:05,772 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 22:21:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 2445 transitions. [2022-03-15 22:21:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:05,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:05,773 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:05,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:05,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:05,982 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:05,982 INFO L85 PathProgramCache]: Analyzing trace with hash -845573310, now seen corresponding path program 186 times [2022-03-15 22:21:05,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:05,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760121515] [2022-03-15 22:21:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:05,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:06,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:06,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760121515] [2022-03-15 22:21:06,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760121515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:06,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484440938] [2022-03-15 22:21:06,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:21:06,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:06,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:06,116 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 22:21:06,116 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 22:21:06,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:21:06,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:06,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:21:06,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:06,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:21:06,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484440938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:06,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:06,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 29 [2022-03-15 22:21:06,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [49648076] [2022-03-15 22:21:06,710 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:06,710 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:06,712 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 22:21:06,712 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:06,779 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [326158#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 326082#(< j2 M2)] [2022-03-15 22:21:06,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:21:06,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:21:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:21:06,780 INFO L87 Difference]: Start difference. First operand 901 states and 2445 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 22:21:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:07,242 INFO L93 Difference]: Finished difference Result 993 states and 2635 transitions. [2022-03-15 22:21:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:21:07,243 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 19 [2022-03-15 22:21:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:07,244 INFO L225 Difference]: With dead ends: 993 [2022-03-15 22:21:07,244 INFO L226 Difference]: Without dead ends: 992 [2022-03-15 22:21:07,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:21:07,244 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:07,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-03-15 22:21:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 903. [2022-03-15 22:21:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.7184035476718402) internal successors, (2452), 902 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2452 transitions. [2022-03-15 22:21:07,259 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2452 transitions. Word has length 19 [2022-03-15 22:21:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:07,259 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 2452 transitions. [2022-03-15 22:21:07,259 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 22:21:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2452 transitions. [2022-03-15 22:21:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:07,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:07,260 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:07,275 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 22:21:07,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:07,461 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1437342425, now seen corresponding path program 187 times [2022-03-15 22:21:07,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:07,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545093808] [2022-03-15 22:21:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:07,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:07,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:07,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545093808] [2022-03-15 22:21:07,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545093808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:07,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251065626] [2022-03-15 22:21:07,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:21:07,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:07,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:07,730 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 22:21:07,731 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 22:21:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:07,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 22:21:07,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:08,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:09,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251065626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:09,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:09,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 38 [2022-03-15 22:21:09,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [658229386] [2022-03-15 22:21:09,151 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:09,152 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:09,154 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 37 transitions. [2022-03-15 22:21:09,154 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:09,429 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [329133#(or (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 329134#(or (<= counter 0) (< j1 M1) (<= (+ 3 j2) M2)), 329132#(or (< j1 M1) (<= (+ j2 1) M2)), 329135#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 329131#(< j1 M1)] [2022-03-15 22:21:09,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:21:09,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:21:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:21:09,430 INFO L87 Difference]: Start difference. First operand 903 states and 2452 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 22:21:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:09,941 INFO L93 Difference]: Finished difference Result 946 states and 2542 transitions. [2022-03-15 22:21:09,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:21:09,941 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 19 [2022-03-15 22:21:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:09,942 INFO L225 Difference]: With dead ends: 946 [2022-03-15 22:21:09,942 INFO L226 Difference]: Without dead ends: 946 [2022-03-15 22:21:09,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=436, Invalid=2534, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 22:21:09,943 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:09,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-03-15 22:21:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 904. [2022-03-15 22:21:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.718715393133998) internal successors, (2455), 903 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2455 transitions. [2022-03-15 22:21:09,954 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2455 transitions. Word has length 19 [2022-03-15 22:21:09,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:09,954 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2455 transitions. [2022-03-15 22:21:09,954 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 22:21:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2455 transitions. [2022-03-15 22:21:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:09,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:09,955 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:09,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:10,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-15 22:21:10,171 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:10,172 INFO L85 PathProgramCache]: Analyzing trace with hash 541513700, now seen corresponding path program 188 times [2022-03-15 22:21:10,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:10,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527027874] [2022-03-15 22:21:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:10,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:10,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:10,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527027874] [2022-03-15 22:21:10,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527027874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:10,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630502019] [2022-03-15 22:21:10,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:21:10,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:10,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:10,438 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 22:21:10,439 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 22:21:10,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:21:10,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:10,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:10,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:11,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630502019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:11,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:11,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:21:11,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1651907662] [2022-03-15 22:21:11,649 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:11,649 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:11,652 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:21:11,652 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:11,931 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [332058#(or (< j2 M2) (< j1 M1) (= counter 0)), 332059#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 332057#(or (< j1 M1) (= counter 0)), 332056#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:21:11,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:21:11,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:21:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:21:11,932 INFO L87 Difference]: Start difference. First operand 904 states and 2455 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:21:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:13,559 INFO L93 Difference]: Finished difference Result 1109 states and 2878 transitions. [2022-03-15 22:21:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 22:21:13,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:21:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:13,561 INFO L225 Difference]: With dead ends: 1109 [2022-03-15 22:21:13,561 INFO L226 Difference]: Without dead ends: 1101 [2022-03-15 22:21:13,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=583, Invalid=4247, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 22:21:13,562 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:13,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:21:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-03-15 22:21:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 908. [2022-03-15 22:21:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 2.7199558985667034) internal successors, (2467), 907 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2467 transitions. [2022-03-15 22:21:13,572 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2467 transitions. Word has length 19 [2022-03-15 22:21:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:13,572 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2467 transitions. [2022-03-15 22:21:13,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:21:13,572 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2467 transitions. [2022-03-15 22:21:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:13,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:13,573 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:13,589 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 22:21:13,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-15 22:21:13,788 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1265940763, now seen corresponding path program 189 times [2022-03-15 22:21:13,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:13,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096815887] [2022-03-15 22:21:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:13,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:14,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:14,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096815887] [2022-03-15 22:21:14,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096815887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:14,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85975252] [2022-03-15 22:21:14,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:21:14,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:14,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:14,026 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 22:21:14,027 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 22:21:14,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:21:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:14,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:21:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:14,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:14,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85975252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:14,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:14,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 30 [2022-03-15 22:21:14,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1087247472] [2022-03-15 22:21:14,597 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:14,598 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:14,600 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:21:14,600 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:14,762 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [335187#(or (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 335186#(or (< j1 M1) (<= (+ j2 1) M2)), 335184#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 335185#(< j1 M1)] [2022-03-15 22:21:14,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:21:14,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:21:14,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:21:14,762 INFO L87 Difference]: Start difference. First operand 908 states and 2467 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:21:15,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:15,277 INFO L93 Difference]: Finished difference Result 958 states and 2570 transitions. [2022-03-15 22:21:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:21:15,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:21:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:15,278 INFO L225 Difference]: With dead ends: 958 [2022-03-15 22:21:15,279 INFO L226 Difference]: Without dead ends: 958 [2022-03-15 22:21:15,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:21:15,279 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:15,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-03-15 22:21:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 909. [2022-03-15 22:21:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 2.7202643171806167) internal successors, (2470), 908 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 2470 transitions. [2022-03-15 22:21:15,288 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 2470 transitions. Word has length 19 [2022-03-15 22:21:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:15,289 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 2470 transitions. [2022-03-15 22:21:15,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:21:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 2470 transitions. [2022-03-15 22:21:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:15,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:15,290 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:15,307 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 22:21:15,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-15 22:21:15,507 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:15,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:15,507 INFO L85 PathProgramCache]: Analyzing trace with hash 644824186, now seen corresponding path program 190 times [2022-03-15 22:21:15,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:15,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101929267] [2022-03-15 22:21:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:15,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:15,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:15,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101929267] [2022-03-15 22:21:15,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101929267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:15,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452141431] [2022-03-15 22:21:15,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:21:15,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:15,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:15,700 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 22:21:15,701 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 22:21:15,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:21:15,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:15,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 22:21:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:16,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:17,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452141431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:17,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:17,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 35 [2022-03-15 22:21:17,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1528404428] [2022-03-15 22:21:17,060 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:17,061 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:17,063 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 22:21:17,063 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:17,152 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [338132#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 338131#(or (< j1 M1) (<= (+ j2 1) M2)), 338130#(< j1 M1)] [2022-03-15 22:21:17,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:21:17,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:21:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1207, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:21:17,152 INFO L87 Difference]: Start difference. First operand 909 states and 2470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22:21:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:17,636 INFO L93 Difference]: Finished difference Result 1148 states and 3021 transitions. [2022-03-15 22:21:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:21:17,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22:21:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:17,638 INFO L225 Difference]: With dead ends: 1148 [2022-03-15 22:21:17,638 INFO L226 Difference]: Without dead ends: 1148 [2022-03-15 22:21:17,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=614, Invalid=2466, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 22:21:17,639 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:17,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:21:17,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-03-15 22:21:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 922. [2022-03-15 22:21:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.727470141150923) internal successors, (2512), 921 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2512 transitions. [2022-03-15 22:21:17,649 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2512 transitions. Word has length 19 [2022-03-15 22:21:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:17,649 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 2512 transitions. [2022-03-15 22:21:17,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22:21:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2512 transitions. [2022-03-15 22:21:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:17,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:17,650 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:17,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:17,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:17,854 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1907332775, now seen corresponding path program 191 times [2022-03-15 22:21:17,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:17,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397793592] [2022-03-15 22:21:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:17,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:18,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:18,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397793592] [2022-03-15 22:21:18,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397793592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:18,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941127467] [2022-03-15 22:21:18,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:21:18,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:18,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:18,121 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 22:21:18,122 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 22:21:18,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:21:18,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:18,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:21:18,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:19,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941127467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:19,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:19,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 12] total 32 [2022-03-15 22:21:19,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [827816051] [2022-03-15 22:21:19,297 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:19,298 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:19,300 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 22:21:19,300 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:19,409 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [341302#(or (< j2 M2) (< j1 M1) (= counter 0)), 341301#(or (< j1 M1) (= counter 0)), 341303#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)))] [2022-03-15 22:21:19,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:21:19,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:19,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:21:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:21:19,410 INFO L87 Difference]: Start difference. First operand 922 states and 2512 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:19,781 INFO L93 Difference]: Finished difference Result 943 states and 2548 transitions. [2022-03-15 22:21:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:21:19,782 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:19,783 INFO L225 Difference]: With dead ends: 943 [2022-03-15 22:21:19,783 INFO L226 Difference]: Without dead ends: 939 [2022-03-15 22:21:19,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=1849, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:21:19,783 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:19,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:21:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-03-15 22:21:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 925. [2022-03-15 22:21:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.727272727272727) internal successors, (2520), 924 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2520 transitions. [2022-03-15 22:21:19,793 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2520 transitions. Word has length 19 [2022-03-15 22:21:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:19,793 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 2520 transitions. [2022-03-15 22:21:19,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:19,793 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2520 transitions. [2022-03-15 22:21:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:19,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:19,794 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:19,809 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 22:21:19,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:19,999 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1042086815, now seen corresponding path program 192 times [2022-03-15 22:21:20,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:20,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409068818] [2022-03-15 22:21:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:20,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:20,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:20,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409068818] [2022-03-15 22:21:20,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409068818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:20,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220218180] [2022-03-15 22:21:20,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:21:20,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:20,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:20,232 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 22:21:20,233 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 22:21:20,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:21:20,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:21:20,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:21:20,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:20,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220218180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:20,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:20,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2022-03-15 22:21:20,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [325210390] [2022-03-15 22:21:20,720 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:20,726 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:20,728 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 22:21:20,728 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:20,769 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [344178#(< j2 M2), 344255#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:21:20,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:21:20,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:21:20,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:21:20,770 INFO L87 Difference]: Start difference. First operand 925 states and 2520 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22:21:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:21,067 INFO L93 Difference]: Finished difference Result 1104 states and 2944 transitions. [2022-03-15 22:21:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:21:21,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22:21:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:21,068 INFO L225 Difference]: With dead ends: 1104 [2022-03-15 22:21:21,068 INFO L226 Difference]: Without dead ends: 1104 [2022-03-15 22:21:21,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:21:21,069 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:21,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:21:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-03-15 22:21:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 920. [2022-03-15 22:21:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.7247007616974974) internal successors, (2504), 919 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2504 transitions. [2022-03-15 22:21:21,079 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2504 transitions. Word has length 19 [2022-03-15 22:21:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:21,079 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 2504 transitions. [2022-03-15 22:21:21,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 22:21:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2504 transitions. [2022-03-15 22:21:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:21,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:21,080 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:21,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:21,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:21,291 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 714240966, now seen corresponding path program 193 times [2022-03-15 22:21:21,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:21,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594875898] [2022-03-15 22:21:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:21,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:21,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:21,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594875898] [2022-03-15 22:21:21,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594875898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:21,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530071641] [2022-03-15 22:21:21,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:21:21,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:21,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:21,494 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 22:21:21,495 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 22:21:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:21,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:21:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:21,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:21:22,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530071641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:22,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:22,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 31 [2022-03-15 22:21:22,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2140417006] [2022-03-15 22:21:22,021 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:22,021 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:22,024 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 22:21:22,024 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:22,345 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [347368#(< j1 M1), 347369#(or (< j1 M1) (<= (+ j2 1) M2)), 347373#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 347371#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 347372#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2))), 347370#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:21:22,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:21:22,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:22,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:21:22,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:21:22,346 INFO L87 Difference]: Start difference. First operand 920 states and 2504 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:23,824 INFO L93 Difference]: Finished difference Result 1049 states and 2787 transitions. [2022-03-15 22:21:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 22:21:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:21:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:23,826 INFO L225 Difference]: With dead ends: 1049 [2022-03-15 22:21:23,826 INFO L226 Difference]: Without dead ends: 1048 [2022-03-15 22:21:23,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=414, Invalid=4008, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 22:21:23,827 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:23,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:21:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-03-15 22:21:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 920. [2022-03-15 22:21:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.7247007616974974) internal successors, (2504), 919 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2504 transitions. [2022-03-15 22:21:23,836 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2504 transitions. Word has length 19 [2022-03-15 22:21:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:23,836 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 2504 transitions. [2022-03-15 22:21:23,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2504 transitions. [2022-03-15 22:21:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:23,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:23,837 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:23,855 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 22:21:24,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-03-15 22:21:24,038 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:24,038 INFO L85 PathProgramCache]: Analyzing trace with hash -532867142, now seen corresponding path program 194 times [2022-03-15 22:21:24,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:24,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718691578] [2022-03-15 22:21:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:24,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:24,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:24,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718691578] [2022-03-15 22:21:24,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718691578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:24,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785818399] [2022-03-15 22:21:24,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:21:24,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:24,352 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 22:21:24,352 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 22:21:24,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:21:24,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:24,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:24,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:25,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785818399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:25,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:25,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:21:25,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1967584756] [2022-03-15 22:21:25,680 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:25,680 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:25,682 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 22:21:25,682 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:25,822 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [350467#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 350465#(or (< j1 M1) (= counter 0)), 350466#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:21:25,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:21:25,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:21:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:21:25,823 INFO L87 Difference]: Start difference. First operand 920 states and 2504 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:26,682 INFO L93 Difference]: Finished difference Result 1001 states and 2675 transitions. [2022-03-15 22:21:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:21:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:26,684 INFO L225 Difference]: With dead ends: 1001 [2022-03-15 22:21:26,684 INFO L226 Difference]: Without dead ends: 997 [2022-03-15 22:21:26,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=374, Invalid=2596, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 22:21:26,685 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:26,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:21:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-03-15 22:21:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 924. [2022-03-15 22:21:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 2.725893824485374) internal successors, (2516), 923 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2516 transitions. [2022-03-15 22:21:26,696 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2516 transitions. Word has length 19 [2022-03-15 22:21:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:26,696 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 2516 transitions. [2022-03-15 22:21:26,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2516 transitions. [2022-03-15 22:21:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:26,697 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:26,697 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:26,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:26,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:26,907 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:26,907 INFO L85 PathProgramCache]: Analyzing trace with hash 332378818, now seen corresponding path program 195 times [2022-03-15 22:21:26,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:26,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678877524] [2022-03-15 22:21:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:26,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:27,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:27,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678877524] [2022-03-15 22:21:27,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678877524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:27,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627649882] [2022-03-15 22:21:27,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:21:27,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:27,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:27,145 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 22:21:27,146 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 22:21:27,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:21:27,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:27,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:21:27,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:27,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:21:27,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627649882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:27,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:27,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 28 [2022-03-15 22:21:27,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1836315654] [2022-03-15 22:21:27,746 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:27,747 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:27,749 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 22:21:27,749 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:27,794 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [353486#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 353411#(< j2 M2)] [2022-03-15 22:21:27,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:21:27,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:21:27,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:21:27,794 INFO L87 Difference]: Start difference. First operand 924 states and 2516 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 22:21:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:28,519 INFO L93 Difference]: Finished difference Result 1363 states and 3612 transitions. [2022-03-15 22:21:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:21:28,519 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 19 [2022-03-15 22:21:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:28,522 INFO L225 Difference]: With dead ends: 1363 [2022-03-15 22:21:28,522 INFO L226 Difference]: Without dead ends: 1362 [2022-03-15 22:21:28,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=443, Invalid=2313, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:21:28,522 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:28,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2022-03-15 22:21:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 924. [2022-03-15 22:21:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 2.7269772481040087) internal successors, (2517), 923 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2517 transitions. [2022-03-15 22:21:28,535 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2517 transitions. Word has length 19 [2022-03-15 22:21:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:28,535 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 2517 transitions. [2022-03-15 22:21:28,535 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 22:21:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2517 transitions. [2022-03-15 22:21:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:28,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:28,536 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:28,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:28,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:28,749 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:28,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash 119027974, now seen corresponding path program 196 times [2022-03-15 22:21:28,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:28,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053372250] [2022-03-15 22:21:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:28,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:28,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:28,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053372250] [2022-03-15 22:21:28,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053372250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:28,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697060310] [2022-03-15 22:21:28,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:21:28,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:28,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:28,996 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 22:21:28,996 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 22:21:29,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:21:29,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:29,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:29,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:29,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697060310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:29,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:29,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 33 [2022-03-15 22:21:29,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1488553999] [2022-03-15 22:21:29,987 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:29,988 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:29,990 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:21:29,990 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:30,166 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [356888#(or (< j1 M1) (= counter 0)), 356889#(or (< j2 M2) (< j1 M1) (= counter 0)), 356887#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 356890#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2)))] [2022-03-15 22:21:30,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:21:30,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:30,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:21:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:21:30,167 INFO L87 Difference]: Start difference. First operand 924 states and 2517 transitions. Second operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 22:21:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:31,137 INFO L93 Difference]: Finished difference Result 1122 states and 2936 transitions. [2022-03-15 22:21:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:21:31,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 22:21:31,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:31,139 INFO L225 Difference]: With dead ends: 1122 [2022-03-15 22:21:31,139 INFO L226 Difference]: Without dead ends: 1118 [2022-03-15 22:21:31,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=546, Invalid=3744, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 22:21:31,139 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:31,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:21:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-03-15 22:21:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 926. [2022-03-15 22:21:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 2.7254054054054055) internal successors, (2521), 925 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 2521 transitions. [2022-03-15 22:21:31,149 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 2521 transitions. Word has length 19 [2022-03-15 22:21:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:31,149 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 2521 transitions. [2022-03-15 22:21:31,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 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 22:21:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 2521 transitions. [2022-03-15 22:21:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:31,150 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:31,150 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:31,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:31,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:31,351 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:31,352 INFO L85 PathProgramCache]: Analyzing trace with hash 843323685, now seen corresponding path program 197 times [2022-03-15 22:21:31,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:31,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294294639] [2022-03-15 22:21:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:31,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:31,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294294639] [2022-03-15 22:21:31,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294294639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:31,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573930059] [2022-03-15 22:21:31,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:21:31,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:31,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:31,644 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 22:21:31,645 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 22:21:31,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 22:21:31,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:31,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:21:31,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:31,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:21:32,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573930059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:32,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:32,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 29 [2022-03-15 22:21:32,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2002814986] [2022-03-15 22:21:32,116 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:32,117 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:32,119 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 22:21:32,119 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:32,458 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [360058#(or (< j1 M1) (<= (+ j2 1) M2)), 360061#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= counter C) (<= (+ j2 4) M2))), 360057#(< j1 M1), 360060#(and (or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)) (or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 3 j2) M2))), 360062#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 360059#(or (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:21:32,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:21:32,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:21:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:21:32,459 INFO L87 Difference]: Start difference. First operand 926 states and 2521 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:33,042 INFO L93 Difference]: Finished difference Result 978 states and 2621 transitions. [2022-03-15 22:21:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:21:33,043 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:21:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:33,044 INFO L225 Difference]: With dead ends: 978 [2022-03-15 22:21:33,044 INFO L226 Difference]: Without dead ends: 968 [2022-03-15 22:21:33,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=265, Invalid=1991, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:21:33,044 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:33,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-03-15 22:21:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 927. [2022-03-15 22:21:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 2.7213822894168467) internal successors, (2520), 926 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2520 transitions. [2022-03-15 22:21:33,069 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2520 transitions. Word has length 19 [2022-03-15 22:21:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:33,069 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 2520 transitions. [2022-03-15 22:21:33,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2520 transitions. [2022-03-15 22:21:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:33,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:33,070 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:33,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:33,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:33,288 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:33,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:33,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1157563014, now seen corresponding path program 198 times [2022-03-15 22:21:33,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:33,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769904011] [2022-03-15 22:21:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:33,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:33,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:33,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769904011] [2022-03-15 22:21:33,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769904011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:33,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325673077] [2022-03-15 22:21:33,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:21:33,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:33,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:33,471 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 22:21:33,472 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 22:21:33,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:21:33,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:33,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:33,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:34,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325673077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:34,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:34,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:21:34,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1636388827] [2022-03-15 22:21:34,247 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:34,248 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:34,250 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 37 transitions. [2022-03-15 22:21:34,250 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:34,522 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [363064#(or (< j2 M2) (< j1 M1) (= counter 0)), 363066#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 363067#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2))), 363065#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 363063#(or (< j1 M1) (= counter 0))] [2022-03-15 22:21:34,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:21:34,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:21:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:21:34,523 INFO L87 Difference]: Start difference. First operand 927 states and 2520 transitions. Second operand has 21 states, 20 states have (on average 1.65) 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 22:21:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:35,923 INFO L93 Difference]: Finished difference Result 1250 states and 3255 transitions. [2022-03-15 22:21:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 22:21:35,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) 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 19 [2022-03-15 22:21:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:35,925 INFO L225 Difference]: With dead ends: 1250 [2022-03-15 22:21:35,925 INFO L226 Difference]: Without dead ends: 1242 [2022-03-15 22:21:35,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=679, Invalid=4723, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 22:21:35,926 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:35,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-03-15 22:21:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 924. [2022-03-15 22:21:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 2.7204767063921995) internal successors, (2511), 923 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2511 transitions. [2022-03-15 22:21:35,936 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2511 transitions. Word has length 19 [2022-03-15 22:21:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:35,936 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 2511 transitions. [2022-03-15 22:21:35,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) 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 22:21:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2511 transitions. [2022-03-15 22:21:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:35,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:35,937 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:35,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:36,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-15 22:21:36,147 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:36,147 INFO L85 PathProgramCache]: Analyzing trace with hash 502085348, now seen corresponding path program 199 times [2022-03-15 22:21:36,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:36,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232877827] [2022-03-15 22:21:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:36,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:36,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:36,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232877827] [2022-03-15 22:21:36,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232877827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:36,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332705169] [2022-03-15 22:21:36,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:21:36,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:36,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:36,460 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 22:21:36,463 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 22:21:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:36,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:36,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:36,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:37,174 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 22:21:37,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332705169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:37,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:37,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:21:37,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1371660389] [2022-03-15 22:21:37,195 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:37,196 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:37,198 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 22:21:37,198 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:37,607 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [366376#(or (< j1 M1) (= counter 0)), 366379#(and (or (< j1 M1) (<= (+ 2 j2) M2)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ 3 j2) M2))), 366381#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 366378#(and (or (< j1 M1) (<= (+ j2 1) M2)) (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2))), 366377#(or (< j2 M2) (< j1 M1) (= counter 0)), 366380#(and (or (= (+ counter (* C (- 3))) 0) (< j1 M1) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ 2 C) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ 3 j2) M2)))] [2022-03-15 22:21:37,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:21:37,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:37,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:21:37,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:21:37,607 INFO L87 Difference]: Start difference. First operand 924 states and 2511 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) 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 22:21:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:38,062 INFO L93 Difference]: Finished difference Result 1029 states and 2754 transitions. [2022-03-15 22:21:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:21:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) 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 19 [2022-03-15 22:21:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:38,064 INFO L225 Difference]: With dead ends: 1029 [2022-03-15 22:21:38,064 INFO L226 Difference]: Without dead ends: 1025 [2022-03-15 22:21:38,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=416, Invalid=2446, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:21:38,064 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:38,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:21:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-03-15 22:21:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 924. [2022-03-15 22:21:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 2.7204767063921995) internal successors, (2511), 923 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2511 transitions. [2022-03-15 22:21:38,074 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2511 transitions. Word has length 19 [2022-03-15 22:21:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:38,074 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 2511 transitions. [2022-03-15 22:21:38,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7142857142857142) 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 22:21:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2511 transitions. [2022-03-15 22:21:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:38,075 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:38,075 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:38,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-15 22:21:38,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-15 22:21:38,290 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:38,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:38,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1695314856, now seen corresponding path program 200 times [2022-03-15 22:21:38,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:38,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276187377] [2022-03-15 22:21:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:38,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:38,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:38,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276187377] [2022-03-15 22:21:38,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276187377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:38,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134397990] [2022-03-15 22:21:38,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:21:38,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:38,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:38,609 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 22:21:38,610 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 22:21:38,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:21:38,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:38,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:38,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:39,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:21:39,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134397990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:39,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:39,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 31 [2022-03-15 22:21:39,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1130500165] [2022-03-15 22:21:39,315 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:39,316 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:39,318 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 37 transitions. [2022-03-15 22:21:39,318 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:39,608 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [369427#(and (or (< j1 M1) (<= (+ j2 1) M2)) (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2))), 369428#(and (or (<= j2 3) (< j1 M1) (<= (+ 3 j2) M2)) (or (= (* 2 C) counter) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= 5 M2))), 369426#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 369424#(or (< j1 M1) (= counter 0)), 369425#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:21:39,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:21:39,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:39,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:21:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:21:39,609 INFO L87 Difference]: Start difference. First operand 924 states and 2511 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) 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 22:21:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:40,054 INFO L93 Difference]: Finished difference Result 1029 states and 2760 transitions. [2022-03-15 22:21:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:21:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) 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 19 [2022-03-15 22:21:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:40,056 INFO L225 Difference]: With dead ends: 1029 [2022-03-15 22:21:40,056 INFO L226 Difference]: Without dead ends: 1025 [2022-03-15 22:21:40,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=2192, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:21:40,056 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:40,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:21:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-03-15 22:21:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 924. [2022-03-15 22:21:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 2.7204767063921995) internal successors, (2511), 923 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2511 transitions. [2022-03-15 22:21:40,066 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2511 transitions. Word has length 19 [2022-03-15 22:21:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:40,066 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 2511 transitions. [2022-03-15 22:21:40,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) 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 22:21:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2511 transitions. [2022-03-15 22:21:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:40,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:40,067 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:40,083 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 22:21:40,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-15 22:21:40,283 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:40,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:40,283 INFO L85 PathProgramCache]: Analyzing trace with hash -103630748, now seen corresponding path program 201 times [2022-03-15 22:21:40,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:40,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172099538] [2022-03-15 22:21:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:40,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:40,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:40,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172099538] [2022-03-15 22:21:40,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172099538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:40,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882043617] [2022-03-15 22:21:40,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:21:40,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:40,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:40,603 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 22:21:40,604 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 22:21:40,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:21:40,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:40,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:40,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:41,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:41,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882043617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:41,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:41,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 33 [2022-03-15 22:21:41,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1072083252] [2022-03-15 22:21:41,302 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:41,302 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:41,304 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:21:41,304 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:41,474 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [372475#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 372477#(or (< j2 M2) (< j1 M1) (= counter 0)), 372476#(or (< j1 M1) (= counter 0)), 372478#(and (or (< j1 M1) (<= (+ j2 1) M2)) (or (= (+ (* (- 1) C) counter) 0) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)))] [2022-03-15 22:21:41,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:21:41,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:21:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:21:41,474 INFO L87 Difference]: Start difference. First operand 924 states and 2511 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:21:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:42,486 INFO L93 Difference]: Finished difference Result 1242 states and 3285 transitions. [2022-03-15 22:21:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 22:21:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:21:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:42,489 INFO L225 Difference]: With dead ends: 1242 [2022-03-15 22:21:42,489 INFO L226 Difference]: Without dead ends: 1238 [2022-03-15 22:21:42,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=650, Invalid=3510, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:21:42,489 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:42,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:21:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2022-03-15 22:21:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1011. [2022-03-15 22:21:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.737623762376238) internal successors, (2765), 1010 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2765 transitions. [2022-03-15 22:21:42,502 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2765 transitions. Word has length 19 [2022-03-15 22:21:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:42,502 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 2765 transitions. [2022-03-15 22:21:42,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:21:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2765 transitions. [2022-03-15 22:21:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:42,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:42,503 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:42,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:42,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-15 22:21:42,720 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash -745022760, now seen corresponding path program 202 times [2022-03-15 22:21:42,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:42,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343966080] [2022-03-15 22:21:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:42,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:42,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343966080] [2022-03-15 22:21:42,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343966080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:42,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720780172] [2022-03-15 22:21:42,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:21:42,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:42,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:42,942 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 22:21:42,943 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 22:21:42,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:21:42,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:42,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:42,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:43,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:43,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720780172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:43,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:43,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 34 [2022-03-15 22:21:43,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1113613277] [2022-03-15 22:21:43,880 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:43,880 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:43,882 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 22:21:43,883 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:43,979 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [375939#(or (< j1 M1) (= counter 0)), 375941#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 375940#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:21:43,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:21:43,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:21:43,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:21:43,980 INFO L87 Difference]: Start difference. First operand 1011 states and 2765 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:44,914 INFO L93 Difference]: Finished difference Result 1530 states and 4115 transitions. [2022-03-15 22:21:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 22:21:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:44,917 INFO L225 Difference]: With dead ends: 1530 [2022-03-15 22:21:44,917 INFO L226 Difference]: Without dead ends: 1523 [2022-03-15 22:21:44,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=609, Invalid=3423, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 22:21:44,917 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 98 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:44,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 0 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:21:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2022-03-15 22:21:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1247. [2022-03-15 22:21:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 2.7865168539325844) internal successors, (3472), 1246 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 3472 transitions. [2022-03-15 22:21:44,931 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 3472 transitions. Word has length 19 [2022-03-15 22:21:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:44,931 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 3472 transitions. [2022-03-15 22:21:44,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 3472 transitions. [2022-03-15 22:21:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:44,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:44,933 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:44,951 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 22:21:45,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:45,146 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:45,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1294866011, now seen corresponding path program 203 times [2022-03-15 22:21:45,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:45,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699711386] [2022-03-15 22:21:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:45,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:45,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:45,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699711386] [2022-03-15 22:21:45,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699711386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:45,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313997598] [2022-03-15 22:21:45,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:21:45,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:45,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:45,519 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 22:21:45,520 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 22:21:45,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:21:45,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:45,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:21:45,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:45,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:21:46,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313997598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:46,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:46,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 32 [2022-03-15 22:21:46,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [304901017] [2022-03-15 22:21:46,139 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:46,139 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:46,142 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 22:21:46,142 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:46,685 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [380162#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 380157#(< j1 M1), 380160#(and (or (<= M2 4) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2) (<= (+ counter 1) C)) (or (<= 4 M2) (< j1 M1) (<= (+ 3 j2) M2))), 380159#(and (or (<= M2 4) (< j1 M1) (<= (+ 2 j2) M2)) (or (not (<= j2 3)) (<= 4 M2) (< j1 M1) (not (<= counter 0)) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= (+ 2 j2) M2) (not (<= j2 2))) (or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2))), 380161#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)) (or (<= M2 4) (< j1 M1) (<= (+ j2 4) M2)) (or (<= 4 M2) (< j1 M1) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ counter 1) C) (<= 1 C) (<= (+ j2 4) M2))), 380158#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:21:46,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:21:46,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:46,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:21:46,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:21:46,686 INFO L87 Difference]: Start difference. First operand 1247 states and 3472 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:47,651 INFO L93 Difference]: Finished difference Result 1299 states and 3569 transitions. [2022-03-15 22:21:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:21:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:21:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:47,653 INFO L225 Difference]: With dead ends: 1299 [2022-03-15 22:21:47,653 INFO L226 Difference]: Without dead ends: 1289 [2022-03-15 22:21:47,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=350, Invalid=2512, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:21:47,654 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:47,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:21:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-03-15 22:21:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1240. [2022-03-15 22:21:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.785310734463277) internal successors, (3451), 1239 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3451 transitions. [2022-03-15 22:21:47,669 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3451 transitions. Word has length 19 [2022-03-15 22:21:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:47,669 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 3451 transitions. [2022-03-15 22:21:47,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3451 transitions. [2022-03-15 22:21:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:47,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:47,670 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:47,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:47,887 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,SelfDestructingSolverStorable204 [2022-03-15 22:21:47,887 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash 802701081, now seen corresponding path program 204 times [2022-03-15 22:21:47,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:47,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629297140] [2022-03-15 22:21:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:47,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:48,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:48,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629297140] [2022-03-15 22:21:48,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629297140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:48,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123326804] [2022-03-15 22:21:48,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:21:48,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:48,073 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 22:21:48,074 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 22:21:48,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:21:48,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:48,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:21:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:48,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:21:48,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123326804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:48,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:48,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 30 [2022-03-15 22:21:48,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1472696916] [2022-03-15 22:21:48,746 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:48,746 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:48,749 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 37 transitions. [2022-03-15 22:21:48,749 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:48,931 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [384111#(< j1 M1), 384112#(or (< j1 M1) (<= (+ j2 1) M2)), 384115#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 384113#(or (< j1 M1) (<= (+ 2 j2) M2)), 384114#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2))] [2022-03-15 22:21:48,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:21:48,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:21:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:21:48,932 INFO L87 Difference]: Start difference. First operand 1240 states and 3451 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 22:21:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:49,359 INFO L93 Difference]: Finished difference Result 1276 states and 3528 transitions. [2022-03-15 22:21:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:21:49,359 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 19 [2022-03-15 22:21:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:49,360 INFO L225 Difference]: With dead ends: 1276 [2022-03-15 22:21:49,361 INFO L226 Difference]: Without dead ends: 1268 [2022-03-15 22:21:49,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:21:49,361 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:49,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:49,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-03-15 22:21:49,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1240. [2022-03-15 22:21:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.7845036319612593) internal successors, (3450), 1239 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3450 transitions. [2022-03-15 22:21:49,373 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3450 transitions. Word has length 19 [2022-03-15 22:21:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:49,373 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 3450 transitions. [2022-03-15 22:21:49,373 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 22:21:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3450 transitions. [2022-03-15 22:21:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:49,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:49,375 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:49,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:49,591 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,SelfDestructingSolverStorable205 [2022-03-15 22:21:49,591 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:49,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1900582107, now seen corresponding path program 205 times [2022-03-15 22:21:49,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:49,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835918627] [2022-03-15 22:21:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:49,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:49,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:49,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835918627] [2022-03-15 22:21:49,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835918627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:49,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436641673] [2022-03-15 22:21:49,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:21:49,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:49,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:49,774 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 22:21:49,774 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 22:21:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:49,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:21:49,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:50,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:21:50,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436641673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:50,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:50,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 33 [2022-03-15 22:21:50,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2072119128] [2022-03-15 22:21:50,505 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:50,505 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:50,508 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 22:21:50,508 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:50,734 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [388034#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 388035#(< j1 M1), 388037#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 388036#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:21:50,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:21:50,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:21:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:21:50,734 INFO L87 Difference]: Start difference. First operand 1240 states and 3450 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:21:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:51,518 INFO L93 Difference]: Finished difference Result 1270 states and 3507 transitions. [2022-03-15 22:21:51,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:21:51,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:21:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:51,538 INFO L225 Difference]: With dead ends: 1270 [2022-03-15 22:21:51,538 INFO L226 Difference]: Without dead ends: 1270 [2022-03-15 22:21:51,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=379, Invalid=2591, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 22:21:51,538 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:51,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:21:51,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2022-03-15 22:21:51,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1241. [2022-03-15 22:21:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.785483870967742) internal successors, (3454), 1240 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 3454 transitions. [2022-03-15 22:21:51,550 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 3454 transitions. Word has length 19 [2022-03-15 22:21:51,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:51,550 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 3454 transitions. [2022-03-15 22:21:51,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 22:21:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 3454 transitions. [2022-03-15 22:21:51,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:51,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:51,552 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:51,567 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 22:21:51,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:51,767 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:51,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:51,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1752993177, now seen corresponding path program 206 times [2022-03-15 22:21:51,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:51,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161305244] [2022-03-15 22:21:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:51,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:52,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:52,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161305244] [2022-03-15 22:21:52,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161305244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:52,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514449845] [2022-03-15 22:21:52,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:21:52,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:52,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:52,050 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 22:21:52,050 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 22:21:52,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:21:52,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:52,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:52,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:52,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:53,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514449845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:53,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:53,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 12] total 32 [2022-03-15 22:21:53,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [661178076] [2022-03-15 22:21:53,460 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:53,461 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:53,463 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 22:21:53,463 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:53,618 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [391967#(or (< j2 M2) (< j1 M1) (= counter 0)), 391966#(or (< j1 M1) (= counter 0)), 391968#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)))] [2022-03-15 22:21:53,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:21:53,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:53,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:21:53,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:21:53,619 INFO L87 Difference]: Start difference. First operand 1241 states and 3454 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:54,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:54,194 INFO L93 Difference]: Finished difference Result 1266 states and 3501 transitions. [2022-03-15 22:21:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:21:54,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:54,196 INFO L225 Difference]: With dead ends: 1266 [2022-03-15 22:21:54,196 INFO L226 Difference]: Without dead ends: 1262 [2022-03-15 22:21:54,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=364, Invalid=2086, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:21:54,197 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:54,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-03-15 22:21:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1241. [2022-03-15 22:21:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.785483870967742) internal successors, (3454), 1240 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 3454 transitions. [2022-03-15 22:21:54,209 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 3454 transitions. Word has length 19 [2022-03-15 22:21:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:54,209 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 3454 transitions. [2022-03-15 22:21:54,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:54,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 3454 transitions. [2022-03-15 22:21:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:54,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:54,210 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:54,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:54,423 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,SelfDestructingSolverStorable207 [2022-03-15 22:21:54,423 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:54,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:54,423 INFO L85 PathProgramCache]: Analyzing trace with hash 631168067, now seen corresponding path program 207 times [2022-03-15 22:21:54,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:54,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571452686] [2022-03-15 22:21:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:54,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:54,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:54,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571452686] [2022-03-15 22:21:54,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571452686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:54,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707956137] [2022-03-15 22:21:54,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:21:54,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:54,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:54,633 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 22:21:54,633 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 22:21:54,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 22:21:54,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:54,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:21:54,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:54,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:21:55,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707956137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:55,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:55,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 29 [2022-03-15 22:21:55,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [508690650] [2022-03-15 22:21:55,098 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:55,098 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:55,101 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 22:21:55,101 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:55,353 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [395883#(or (< j1 M1) (<= (+ 2 j2) M2)), 395886#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 395882#(or (< j1 M1) (<= (+ j2 1) M2)), 395881#(< j1 M1), 395884#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 395885#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2)))] [2022-03-15 22:21:55,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:21:55,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:21:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:21:55,353 INFO L87 Difference]: Start difference. First operand 1241 states and 3454 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:55,823 INFO L93 Difference]: Finished difference Result 1276 states and 3527 transitions. [2022-03-15 22:21:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:21:55,824 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 22:21:55,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:55,825 INFO L225 Difference]: With dead ends: 1276 [2022-03-15 22:21:55,825 INFO L226 Difference]: Without dead ends: 1266 [2022-03-15 22:21:55,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:21:55,827 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:55,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-03-15 22:21:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1236. [2022-03-15 22:21:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 2.786234817813765) internal successors, (3441), 1235 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3441 transitions. [2022-03-15 22:21:55,839 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3441 transitions. Word has length 19 [2022-03-15 22:21:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:55,839 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 3441 transitions. [2022-03-15 22:21:55,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3441 transitions. [2022-03-15 22:21:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:55,840 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:55,840 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:55,858 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 22:21:56,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:56,043 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:56,043 INFO L85 PathProgramCache]: Analyzing trace with hash -615940041, now seen corresponding path program 208 times [2022-03-15 22:21:56,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:56,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313659069] [2022-03-15 22:21:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:56,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:56,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:56,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313659069] [2022-03-15 22:21:56,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313659069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:56,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745743235] [2022-03-15 22:21:56,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:21:56,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:56,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:56,289 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 22:21:56,297 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 22:21:56,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:21:56,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:56,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:21:56,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:21:56,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:57,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745743235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:57,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:57,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 12] total 32 [2022-03-15 22:21:57,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1994473205] [2022-03-15 22:21:57,256 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:57,257 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:57,259 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 22:21:57,259 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:57,361 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [399799#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 399797#(or (< j1 M1) (= counter 0)), 399798#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:21:57,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:21:57,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:57,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:21:57,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:21:57,361 INFO L87 Difference]: Start difference. First operand 1236 states and 3441 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:57,910 INFO L93 Difference]: Finished difference Result 1382 states and 3766 transitions. [2022-03-15 22:21:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:21:57,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:57,912 INFO L225 Difference]: With dead ends: 1382 [2022-03-15 22:21:57,912 INFO L226 Difference]: Without dead ends: 1369 [2022-03-15 22:21:57,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=462, Invalid=2294, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:21:57,913 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:57,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:21:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-03-15 22:21:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1238. [2022-03-15 22:21:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.7849636216653195) internal successors, (3445), 1237 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3445 transitions. [2022-03-15 22:21:57,925 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3445 transitions. Word has length 19 [2022-03-15 22:21:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:57,925 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 3445 transitions. [2022-03-15 22:21:57,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 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 22:21:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3445 transitions. [2022-03-15 22:21:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:57,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:57,927 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:57,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:58,135 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,SelfDestructingSolverStorable209 [2022-03-15 22:21:58,135 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1128297305, now seen corresponding path program 209 times [2022-03-15 22:21:58,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:58,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95129761] [2022-03-15 22:21:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:58,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:21:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:58,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:21:58,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95129761] [2022-03-15 22:21:58,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95129761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:21:58,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681150115] [2022-03-15 22:21:58,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:21:58,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:21:58,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:21:58,306 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 22:21:58,307 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 22:21:58,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:21:58,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:21:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:21:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:21:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:21:58,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:21:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:21:58,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681150115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:21:58,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:21:58,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 27 [2022-03-15 22:21:58,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1987421578] [2022-03-15 22:21:58,639 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:21:58,639 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:21:58,641 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 37 transitions. [2022-03-15 22:21:58,642 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:21:58,811 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [403830#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 403827#(or (< j1 M1) (<= (+ j2 1) M2)), 403828#(or (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 403829#(or (< j1 M1) (<= (+ 3 j2) M2) (<= counter C)), 403826#(< j1 M1)] [2022-03-15 22:21:58,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:21:58,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:21:58,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:21:58,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:21:58,811 INFO L87 Difference]: Start difference. First operand 1238 states and 3445 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 22:21:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:21:59,613 INFO L93 Difference]: Finished difference Result 1375 states and 3730 transitions. [2022-03-15 22:21:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:21:59,613 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 19 [2022-03-15 22:21:59,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:21:59,615 INFO L225 Difference]: With dead ends: 1375 [2022-03-15 22:21:59,615 INFO L226 Difference]: Without dead ends: 1375 [2022-03-15 22:21:59,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=446, Invalid=2634, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 22:21:59,615 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:21:59,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:21:59,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-03-15 22:21:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1245. [2022-03-15 22:21:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 2.7813504823151125) internal successors, (3460), 1244 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:21:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3460 transitions. [2022-03-15 22:21:59,628 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3460 transitions. Word has length 19 [2022-03-15 22:21:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:21:59,628 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 3460 transitions. [2022-03-15 22:21:59,628 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 22:21:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3460 transitions. [2022-03-15 22:21:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:21:59,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:21:59,629 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:21:59,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-03-15 22:21:59,845 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,SelfDestructingSolverStorable210 [2022-03-15 22:21:59,845 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:21:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:21:59,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2078589401, now seen corresponding path program 210 times [2022-03-15 22:21:59,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:21:59,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563675229] [2022-03-15 22:21:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:21:59,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:21:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:00,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:00,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563675229] [2022-03-15 22:22:00,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563675229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:00,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216343929] [2022-03-15 22:22:00,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:22:00,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:00,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:00,135 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 22:22:00,136 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 22:22:00,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:22:00,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:22:00,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:22:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:00,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:01,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216343929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:01,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:01,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 12] total 31 [2022-03-15 22:22:01,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [459699796] [2022-03-15 22:22:01,096 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:01,096 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:01,098 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 22:22:01,098 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:01,198 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [407884#(or (< j2 M2) (< j1 M1) (= counter 0)), 407885#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 407883#(or (< j1 M1) (= counter 0))] [2022-03-15 22:22:01,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:22:01,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:01,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:22:01,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:22:01,199 INFO L87 Difference]: Start difference. First operand 1245 states and 3460 transitions. Second operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:22:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:22:01,759 INFO L93 Difference]: Finished difference Result 1382 states and 3768 transitions. [2022-03-15 22:22:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:22:01,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:22:01,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:22:01,770 INFO L225 Difference]: With dead ends: 1382 [2022-03-15 22:22:01,770 INFO L226 Difference]: Without dead ends: 1369 [2022-03-15 22:22:01,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=409, Invalid=2141, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:22:01,770 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:22:01,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:22:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-03-15 22:22:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1246. [2022-03-15 22:22:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 2.780722891566265) internal successors, (3462), 1245 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3462 transitions. [2022-03-15 22:22:01,783 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3462 transitions. Word has length 19 [2022-03-15 22:22:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:22:01,783 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 3462 transitions. [2022-03-15 22:22:01,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 22:22:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3462 transitions. [2022-03-15 22:22:01,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:22:01,784 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:22:01,784 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:22:01,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-15 22:22:01,988 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,SelfDestructingSolverStorable211 [2022-03-15 22:22:01,989 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:22:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:22:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1003018770, now seen corresponding path program 211 times [2022-03-15 22:22:01,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:22:01,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22595491] [2022-03-15 22:22:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:22:01,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:22:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:02,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:02,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22595491] [2022-03-15 22:22:02,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22595491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:02,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809810378] [2022-03-15 22:22:02,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:22:02,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:02,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:02,314 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 22:22:02,315 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 22:22:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 22:22:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:03,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:03,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809810378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:03,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:03,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-03-15 22:22:03,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1444360785] [2022-03-15 22:22:03,631 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:03,632 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:03,635 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 64 transitions. [2022-03-15 22:22:03,635 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:04,749 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [411948#(or (< j1 M1) (<= (+ j2 1) M2)), 411947#(< j1 M1), 411953#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ 3 j2))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter)) (or (<= counter 0) (< j1 M1) (<= (* 3 C) counter))), 411952#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= M2 (+ 2 j2))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= (+ C 1) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter))), 411951#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 411955#(and (or (< j1 M1) (<= (+ 5 j2) M2)) (or (< j1 M1) (<= counter (* 5 C))) (or (< j1 M1) (<= M2 (+ 5 j2))) (or (< j1 M1) (<= (* 5 C) counter))), 411949#(or (< j1 M1) (<= (+ 2 j2) M2)), 411954#(and (or (< j1 M1) (<= 1 counter) (<= C 0)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter)) (or (<= counter 0) (< j1 M1) (<= (* C 4) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (not (= (+ (* (- 1) C) counter) counter))) (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 4)))), 411958#(and (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= M2 (+ 5 j2))) (or (<= counter (* 2 C)) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= (* 2 C) counter)) (or (<= (+ 5 j2) M2) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)))), 411950#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 411957#(and (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= (* 3 C) counter)) (or (< (+ 2 j1) M1) (<= counter (* 3 C)) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (<= (+ 5 j2) M2) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= M2 (+ 5 j2)))), 411960#(and (or (not (< (+ j1 4) M1)) (<= (+ 5 j2) M2) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (<= counter 0) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (<= 0 counter) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (< (+ 5 j1) M1) (<= M2 (+ 5 j2)))), 411956#(and (or (not (< j1 M1)) (< (+ j1 1) M1) (<= M2 (+ 5 j2))) (or (not (< j1 M1)) (<= (+ 5 j2) M2) (< (+ j1 1) M1)) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= counter (* C 4))) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (* C 4) counter))), 411959#(and (or (not (< (+ 3 j1) M1)) (<= C counter) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (<= (+ 5 j2) M2) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (< (+ j1 4) M1) (<= M2 (+ 5 j2))) (or (not (< (+ 3 j1) M1)) (<= counter C) (< (+ j1 4) M1)))] [2022-03-15 22:22:04,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 22:22:04,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 22:22:04,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2831, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 22:22:04,750 INFO L87 Difference]: Start difference. First operand 1246 states and 3462 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:22:07,514 INFO L93 Difference]: Finished difference Result 1489 states and 4005 transitions. [2022-03-15 22:22:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 22:22:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:22:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:22:07,517 INFO L225 Difference]: With dead ends: 1489 [2022-03-15 22:22:07,517 INFO L226 Difference]: Without dead ends: 1489 [2022-03-15 22:22:07,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=900, Invalid=6756, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 22:22:07,517 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 178 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:22:07,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 0 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:22:07,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-03-15 22:22:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1254. [2022-03-15 22:22:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 2.7805267358339982) internal successors, (3484), 1253 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 3484 transitions. [2022-03-15 22:22:07,536 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 3484 transitions. Word has length 20 [2022-03-15 22:22:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:22:07,536 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 3484 transitions. [2022-03-15 22:22:07,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 3484 transitions. [2022-03-15 22:22:07,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:22:07,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:22:07,537 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:22:07,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-03-15 22:22:07,742 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,SelfDestructingSolverStorable212 [2022-03-15 22:22:07,742 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:22:07,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:22:07,742 INFO L85 PathProgramCache]: Analyzing trace with hash 264801173, now seen corresponding path program 212 times [2022-03-15 22:22:07,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:22:07,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169267446] [2022-03-15 22:22:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:22:07,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:22:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:08,009 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 22:22:08,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:08,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169267446] [2022-03-15 22:22:08,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169267446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:08,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809312085] [2022-03-15 22:22:08,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:22:08,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:08,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:08,011 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 22:22:08,012 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 22:22:08,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:22:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:22:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:22:08,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:08,422 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 22:22:08,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:08,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809312085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:08,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:08,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2022-03-15 22:22:08,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1787730457] [2022-03-15 22:22:08,762 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:08,763 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:08,767 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 62 transitions. [2022-03-15 22:22:08,767 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:09,811 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [416181#(and (or (<= counter (* 6 C)) (< j1 M1)) (or (< j1 M1) (<= (* 6 C) counter)) (or (<= (+ 6 j2) M2) (< j1 M1))), 416182#(and (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (* 5 C) counter)) (or (not (< j1 M1)) (<= counter (* 5 C)) (< (+ j1 1) M1)) (or (not (< j1 M1)) (<= (+ 6 j2) M2) (< (+ j1 1) M1))), 416184#(and (or (<= (+ 6 j2) M2) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= (* 3 C) counter)) (or (<= counter (* 3 C)) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)))), 416183#(and (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= counter (* C 4))) (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= (* C 4) counter)) (or (< (+ 2 j1) M1) (<= (+ 6 j2) M2) (not (< (+ j1 1) M1)))), 416179#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* C 4) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= counter (* C 4))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter))), 416177#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 416185#(and (or (not (< (+ 3 j1) M1)) (< (+ j1 4) M1) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ 3 j1) M1)) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (<= (+ 6 j2) M2) (< (+ j1 4) M1))), 416186#(and (or (not (< (+ j1 4) M1)) (< (+ 5 j1) M1) (<= counter C)) (or (not (< (+ j1 4) M1)) (<= (+ 6 j2) M2) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (< (+ 5 j1) M1) (<= C counter))), 416175#(or (< j2 M2) (< j1 M1) (= counter 0)), 416174#(or (< j1 M1) (= counter 0)), 416176#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 416178#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 416187#(and (or (not (< (+ 5 j1) M1)) (<= 0 counter) (< (+ 6 j1) M1)) (or (not (< (+ 5 j1) M1)) (<= (+ 6 j2) M2) (< (+ 6 j1) M1)) (or (not (< (+ 5 j1) M1)) (<= counter 0) (< (+ 6 j1) M1))), 416180#(and (or (<= (+ 6 j2) M2) (< j1 M1) (<= (* 5 C) counter)) (or (<= (+ 6 j2) M2) (< j1 M1) (<= counter (* 5 C))) (or (<= (+ 6 j2) M2) (< j1 M1) (<= 1 counter)))] [2022-03-15 22:22:09,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 22:22:09,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 22:22:09,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2524, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:22:09,812 INFO L87 Difference]: Start difference. First operand 1254 states and 3484 transitions. Second operand has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:22:12,818 INFO L93 Difference]: Finished difference Result 1541 states and 4091 transitions. [2022-03-15 22:22:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 22:22:12,818 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:22:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:22:12,820 INFO L225 Difference]: With dead ends: 1541 [2022-03-15 22:22:12,820 INFO L226 Difference]: Without dead ends: 1534 [2022-03-15 22:22:12,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=914, Invalid=5728, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 22:22:12,821 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 247 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:22:12,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 0 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:22:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2022-03-15 22:22:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1268. [2022-03-15 22:22:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 2.7813733228097868) internal successors, (3524), 1267 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 3524 transitions. [2022-03-15 22:22:12,834 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 3524 transitions. Word has length 20 [2022-03-15 22:22:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:22:12,834 INFO L470 AbstractCegarLoop]: Abstraction has 1268 states and 3524 transitions. [2022-03-15 22:22:12,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 3524 transitions. [2022-03-15 22:22:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:22:12,835 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:22:12,835 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:22:12,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-03-15 22:22:13,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-15 22:22:13,051 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:22:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:22:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2100730693, now seen corresponding path program 213 times [2022-03-15 22:22:13,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:22:13,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804911743] [2022-03-15 22:22:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:22:13,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:22:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:13,258 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 22:22:13,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:13,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804911743] [2022-03-15 22:22:13,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804911743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:13,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933822824] [2022-03-15 22:22:13,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:22:13,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:13,260 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 22:22:13,261 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 22:22:13,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:22:13,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:22:13,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:22:13,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:13,758 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 22:22:13,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:22:14,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933822824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:14,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:14,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 36 [2022-03-15 22:22:14,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1951861050] [2022-03-15 22:22:14,235 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:14,236 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:14,239 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 54 transitions. [2022-03-15 22:22:14,239 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:15,196 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [420475#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 420479#(and (or (not (< (+ 3 j1) M1)) (<= counter C)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= C counter))), 420477#(and (or (not (< (+ j1 1) M1)) (<= (* 3 C) counter)) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= counter (* 3 C)) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 420474#(or (< j2 M2) (< j1 M1) (= counter 0)), 420482#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* C 4) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= counter (* C 4))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter))), 420480#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 420483#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 420481#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 420473#(or (< j1 M1) (= counter 0)), 420478#(and (or (not (< (+ 2 j1) M1)) (<= (* 2 C) counter)) (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter (* 2 C)) (not (< (+ 2 j1) M1)))), 420476#(and (or (not (< j1 M1)) (<= counter (* C 4))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= (+ j2 4) j1)) (or (not (< j1 M1)) (<= (* C 4) counter)))] [2022-03-15 22:22:15,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 22:22:15,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 22:22:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2105, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:22:15,197 INFO L87 Difference]: Start difference. First operand 1268 states and 3524 transitions. Second operand has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:22:20,387 INFO L93 Difference]: Finished difference Result 1703 states and 4333 transitions. [2022-03-15 22:22:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 22:22:20,387 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:22:20,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:22:20,389 INFO L225 Difference]: With dead ends: 1703 [2022-03-15 22:22:20,389 INFO L226 Difference]: Without dead ends: 1687 [2022-03-15 22:22:20,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1829, Invalid=10827, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 22:22:20,390 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 303 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 22:22:20,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 0 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 22:22:20,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2022-03-15 22:22:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1277. [2022-03-15 22:22:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 2.7789968652037618) internal successors, (3546), 1276 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 3546 transitions. [2022-03-15 22:22:20,404 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 3546 transitions. Word has length 20 [2022-03-15 22:22:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:22:20,405 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 3546 transitions. [2022-03-15 22:22:20,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 3546 transitions. [2022-03-15 22:22:20,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:22:20,406 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:22:20,406 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:22:20,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-03-15 22:22:20,611 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,SelfDestructingSolverStorable214 [2022-03-15 22:22:20,612 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:22:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:22:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1594166191, now seen corresponding path program 214 times [2022-03-15 22:22:20,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:22:20,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40922665] [2022-03-15 22:22:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:22:20,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:22:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:20,864 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 22:22:20,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:20,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40922665] [2022-03-15 22:22:20,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40922665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:20,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743126131] [2022-03-15 22:22:20,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:22:20,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:20,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:20,865 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 22:22:20,866 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 22:22:20,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:22:20,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:22:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:22:20,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:21,312 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 22:22:21,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:22:21,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743126131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:21,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:21,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 37 [2022-03-15 22:22:21,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [846303570] [2022-03-15 22:22:21,755 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:21,755 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:21,758 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 50 transitions. [2022-03-15 22:22:21,758 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:22,681 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [425022#(and (or (not (< j1 M1)) (<= counter (* C 4))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= (+ j2 4) j1)) (or (not (< j1 M1)) (<= (* C 4) counter))), 425023#(and (or (not (< (+ j1 1) M1)) (<= (* 3 C) counter)) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= counter (* 3 C)) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 425029#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 425024#(and (or (not (< (+ 2 j1) M1)) (<= (* 2 C) counter)) (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter (* 2 C)) (not (< (+ 2 j1) M1)))), 425030#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 425031#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 425027#(and (or (not (< (+ 3 j1) M1)) (<= counter C)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= C counter))), 425025#(or (< j1 M1) (= counter 0)), 425026#(or (< j2 M2) (< j1 M1) (= counter 0)), 425028#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter)))] [2022-03-15 22:22:22,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 22:22:22,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:22,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 22:22:22,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2082, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:22:22,682 INFO L87 Difference]: Start difference. First operand 1277 states and 3546 transitions. Second operand has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:22:28,008 INFO L93 Difference]: Finished difference Result 1803 states and 4528 transitions. [2022-03-15 22:22:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 22:22:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:22:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:22:28,010 INFO L225 Difference]: With dead ends: 1803 [2022-03-15 22:22:28,011 INFO L226 Difference]: Without dead ends: 1787 [2022-03-15 22:22:28,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2639 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1593, Invalid=10839, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 22:22:28,011 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 246 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 22:22:28,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 0 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 22:22:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2022-03-15 22:22:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1293. [2022-03-15 22:22:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.7840557275541795) internal successors, (3597), 1292 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3597 transitions. [2022-03-15 22:22:28,026 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3597 transitions. Word has length 20 [2022-03-15 22:22:28,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:22:28,026 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 3597 transitions. [2022-03-15 22:22:28,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3597 transitions. [2022-03-15 22:22:28,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:22:28,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:22:28,027 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:22:28,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-15 22:22:28,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:28,243 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:22:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:22:28,243 INFO L85 PathProgramCache]: Analyzing trace with hash 503400901, now seen corresponding path program 215 times [2022-03-15 22:22:28,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:22:28,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989839857] [2022-03-15 22:22:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:22:28,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:22:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:28,476 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 22:22:28,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:28,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989839857] [2022-03-15 22:22:28,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989839857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:28,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642546573] [2022-03-15 22:22:28,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:22:28,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:28,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:28,478 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 22:22:28,479 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 22:22:28,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:22:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:22:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:22:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:28,990 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 22:22:28,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:22:29,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642546573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:29,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:29,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 37 [2022-03-15 22:22:29,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1356908816] [2022-03-15 22:22:29,448 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:29,449 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:29,459 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 46 transitions. [2022-03-15 22:22:29,459 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:30,117 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [429703#(or (< j2 M2) (< j1 M1) (= counter 0)), 429702#(or (< j1 M1) (= counter 0)), 429707#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 429704#(and (or (not (< (+ 2 j1) M1)) (<= (* 2 C) counter)) (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter (* 2 C)) (not (< (+ 2 j1) M1)))), 429708#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 429706#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 429700#(and (or (not (< j1 M1)) (<= counter (* C 4))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= (+ j2 4) j1)) (or (not (< j1 M1)) (<= (* C 4) counter))), 429705#(and (or (not (< (+ 3 j1) M1)) (<= counter C)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= C counter))), 429701#(and (or (not (< (+ j1 1) M1)) (<= (* 3 C) counter)) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= counter (* 3 C)) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:22:30,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 22:22:30,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 22:22:30,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1985, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:22:30,118 INFO L87 Difference]: Start difference. First operand 1293 states and 3597 transitions. Second operand has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 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 22:22:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:22:36,208 INFO L93 Difference]: Finished difference Result 1840 states and 4663 transitions. [2022-03-15 22:22:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 22:22:36,209 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 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 20 [2022-03-15 22:22:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:22:36,211 INFO L225 Difference]: With dead ends: 1840 [2022-03-15 22:22:36,211 INFO L226 Difference]: Without dead ends: 1827 [2022-03-15 22:22:36,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1712, Invalid=11860, Unknown=0, NotChecked=0, Total=13572 [2022-03-15 22:22:36,211 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 241 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:22:36,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 0 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:22:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2022-03-15 22:22:36,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1343. [2022-03-15 22:22:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.7943368107302535) internal successors, (3750), 1342 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 3750 transitions. [2022-03-15 22:22:36,227 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 3750 transitions. Word has length 20 [2022-03-15 22:22:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:22:36,227 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 3750 transitions. [2022-03-15 22:22:36,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 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 22:22:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 3750 transitions. [2022-03-15 22:22:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:22:36,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:22:36,228 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:22:36,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-03-15 22:22:36,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:36,444 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:22:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:22:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2095085009, now seen corresponding path program 216 times [2022-03-15 22:22:36,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:22:36,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735934250] [2022-03-15 22:22:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:22:36,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:22:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:36,637 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 22:22:36,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:36,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735934250] [2022-03-15 22:22:36,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735934250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:36,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592678017] [2022-03-15 22:22:36,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:22:36,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:36,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:36,638 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 22:22:36,639 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 22:22:36,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:22:36,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:22:36,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:22:36,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:36,992 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 22:22:36,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:22:37,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592678017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:37,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:37,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 37 [2022-03-15 22:22:37,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [85881968] [2022-03-15 22:22:37,314 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:37,315 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:37,317 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:22:37,318 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:37,701 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [434530#(or (< j1 M1) (= counter 0)), 434526#(and (or (not (< j1 M1)) (<= counter (* C 4))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= (+ j2 4) j1)) (or (not (< j1 M1)) (<= (* C 4) counter))), 434528#(and (or (not (< (+ 2 j1) M1)) (<= (* 2 C) counter)) (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter (* 2 C)) (not (< (+ 2 j1) M1)))), 434531#(or (< j2 M2) (< j1 M1) (= counter 0)), 434532#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 434533#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 434527#(and (or (not (< (+ j1 1) M1)) (<= (* 3 C) counter)) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= counter (* 3 C)) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 434529#(and (or (not (< (+ 3 j1) M1)) (<= counter C)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= C counter)))] [2022-03-15 22:22:37,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 22:22:37,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:37,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 22:22:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:22:37,702 INFO L87 Difference]: Start difference. First operand 1343 states and 3750 transitions. Second operand has 25 states, 24 states have (on average 1.625) internal successors, (39), 24 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 22:22:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:22:43,939 INFO L93 Difference]: Finished difference Result 2010 states and 5040 transitions. [2022-03-15 22:22:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 22:22:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.625) internal successors, (39), 24 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 20 [2022-03-15 22:22:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:22:43,942 INFO L225 Difference]: With dead ends: 2010 [2022-03-15 22:22:43,942 INFO L226 Difference]: Without dead ends: 1996 [2022-03-15 22:22:43,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1743, Invalid=11367, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 22:22:43,942 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 255 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:22:43,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 0 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:22:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2022-03-15 22:22:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1438. [2022-03-15 22:22:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 2.811412665274878) internal successors, (4040), 1437 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4040 transitions. [2022-03-15 22:22:43,962 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4040 transitions. Word has length 20 [2022-03-15 22:22:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:22:43,962 INFO L470 AbstractCegarLoop]: Abstraction has 1438 states and 4040 transitions. [2022-03-15 22:22:43,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.625) internal successors, (39), 24 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 22:22:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4040 transitions. [2022-03-15 22:22:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:22:43,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:22:43,963 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:22:43,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-03-15 22:22:44,180 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,SelfDestructingSolverStorable217 [2022-03-15 22:22:44,181 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:22:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:22:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1453692997, now seen corresponding path program 217 times [2022-03-15 22:22:44,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:22:44,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137296707] [2022-03-15 22:22:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:22:44,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:22:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:44,385 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 22:22:44,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:44,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137296707] [2022-03-15 22:22:44,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137296707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:44,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115822796] [2022-03-15 22:22:44,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:22:44,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:44,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:44,387 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 22:22:44,388 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 22:22:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:44,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:22:44,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:44,757 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 22:22:44,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:45,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115822796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:45,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:45,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2022-03-15 22:22:45,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [510493511] [2022-03-15 22:22:45,620 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:45,621 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:45,623 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 22:22:45,624 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:45,930 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [439715#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 439713#(and (or (not (< (+ 2 j1) M1)) (<= (* 2 C) counter)) (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter (* 2 C)) (not (< (+ 2 j1) M1)))), 439716#(or (< j2 M2) (< j1 M1) (= counter 0)), 439714#(and (or (not (< (+ 3 j1) M1)) (<= counter C)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= C counter))), 439710#(or (< j1 M1) (= counter 0)), 439711#(and (or (not (< j1 M1)) (<= counter (* C 4))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= (+ j2 4) j1)) (or (not (< j1 M1)) (<= (* C 4) counter))), 439712#(and (or (not (< (+ j1 1) M1)) (<= (* 3 C) counter)) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= counter (* 3 C)) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:22:45,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:22:45,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:45,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:22:45,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:22:45,931 INFO L87 Difference]: Start difference. First operand 1438 states and 4040 transitions. Second operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 22:22:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:22:51,158 INFO L93 Difference]: Finished difference Result 2254 states and 5652 transitions. [2022-03-15 22:22:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 22:22:51,158 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 22:22:51,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:22:51,161 INFO L225 Difference]: With dead ends: 2254 [2022-03-15 22:22:51,161 INFO L226 Difference]: Without dead ends: 2235 [2022-03-15 22:22:51,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1839, Invalid=10817, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 22:22:51,162 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 275 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 22:22:51,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 0 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 22:22:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2022-03-15 22:22:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1287. [2022-03-15 22:22:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.797045101088647) internal successors, (3597), 1286 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 3597 transitions. [2022-03-15 22:22:51,179 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 3597 transitions. Word has length 20 [2022-03-15 22:22:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:22:51,179 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 3597 transitions. [2022-03-15 22:22:51,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 22:22:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 3597 transitions. [2022-03-15 22:22:51,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:22:51,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:22:51,180 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:22:51,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-03-15 22:22:51,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:51,395 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:22:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:22:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1976028339, now seen corresponding path program 218 times [2022-03-15 22:22:51,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:22:51,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068569515] [2022-03-15 22:22:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:22:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:22:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:51,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:51,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068569515] [2022-03-15 22:22:51,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068569515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:51,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441935019] [2022-03-15 22:22:51,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:22:51,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:51,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:51,611 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 22:22:51,612 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 22:22:51,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:22:51,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:22:51,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:22:51,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:22:51,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:22:52,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441935019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:52,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:52,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2022-03-15 22:22:52,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [365682169] [2022-03-15 22:22:52,044 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:52,044 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:52,047 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 22:22:52,047 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:52,261 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [444830#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 444829#(and (or (not (< (+ 3 j1) M1)) (<= counter C)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= C counter))), 444826#(and (or (not (< j1 M1)) (<= counter (* C 4))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= (+ j2 4) j1)) (or (not (< j1 M1)) (<= (* C 4) counter))), 444828#(and (or (not (< (+ 2 j1) M1)) (<= (* 2 C) counter)) (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter (* 2 C)) (not (< (+ 2 j1) M1)))), 444744#(< j2 M2), 444827#(and (or (not (< (+ j1 1) M1)) (<= (* 3 C) counter)) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= counter (* 3 C)) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:22:52,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:22:52,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:52,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:22:52,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:22:52,261 INFO L87 Difference]: Start difference. First operand 1287 states and 3597 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 22:22:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:22:52,786 INFO L93 Difference]: Finished difference Result 1866 states and 5074 transitions. [2022-03-15 22:22:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:22:52,786 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 20 [2022-03-15 22:22:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:22:52,788 INFO L225 Difference]: With dead ends: 1866 [2022-03-15 22:22:52,788 INFO L226 Difference]: Without dead ends: 1864 [2022-03-15 22:22:52,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=601, Invalid=3059, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 22:22:52,789 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:22:52,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:22:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-03-15 22:22:52,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1314. [2022-03-15 22:22:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 2.805788271134806) internal successors, (3684), 1313 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 3684 transitions. [2022-03-15 22:22:52,804 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 3684 transitions. Word has length 20 [2022-03-15 22:22:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:22:52,804 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 3684 transitions. [2022-03-15 22:22:52,804 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 22:22:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 3684 transitions. [2022-03-15 22:22:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:22:52,806 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:22:52,806 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:22:52,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-03-15 22:22:53,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-03-15 22:22:53,021 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:22:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:22:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2082259042, now seen corresponding path program 219 times [2022-03-15 22:22:53,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:22:53,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309390336] [2022-03-15 22:22:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:22:53,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:22:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:53,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:53,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309390336] [2022-03-15 22:22:53,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309390336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:53,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313874805] [2022-03-15 22:22:53,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:22:53,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:53,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:53,213 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 22:22:53,214 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 22:22:53,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:22:53,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:22:53,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:22:53,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:22:53,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:22:54,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313874805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:54,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:54,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 35 [2022-03-15 22:22:54,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1916025789] [2022-03-15 22:22:54,061 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:54,062 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:54,065 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 56 transitions. [2022-03-15 22:22:54,065 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:54,941 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [449519#(or (< j1 M1) (<= (+ j2 1) M2)), 449520#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= j1 (+ 2 j2)) (not (< (+ j1 1) M1))) (or (<= 2 j1) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 449526#(and (or (<= j2 0) (< j1 M1) (<= 1 counter)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 3 j2))) (or (< j1 M1) (<= 1 counter) (<= 5 M2)) (or (<= counter 0) (< j1 M1) (<= (* 3 C) counter))), 449517#(and (or (not (< j1 M1)) (<= 3 j1)) (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 3 j2)))), 449518#(< j1 M1), 449521#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (<= j1 (+ j2 1)) (not (< (+ 2 j1) M1))) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 1 j1))), 449523#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 449525#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* 2 C) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= M2 (+ 2 j2))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter))), 449522#(or (< j1 M1) (<= (+ 2 j2) M2)), 449524#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 449527#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= 0 j1)) (or (not (< (+ 3 j1) M1)) (<= j1 j2)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= j2 0)))] [2022-03-15 22:22:54,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 22:22:54,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:54,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 22:22:54,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1952, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:22:54,942 INFO L87 Difference]: Start difference. First operand 1314 states and 3684 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:22:57,077 INFO L93 Difference]: Finished difference Result 1579 states and 4160 transitions. [2022-03-15 22:22:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 22:22:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:22:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:22:57,080 INFO L225 Difference]: With dead ends: 1579 [2022-03-15 22:22:57,080 INFO L226 Difference]: Without dead ends: 1579 [2022-03-15 22:22:57,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=750, Invalid=6560, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 22:22:57,080 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 178 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:22:57,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 0 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:22:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-03-15 22:22:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1313. [2022-03-15 22:22:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.805640243902439) internal successors, (3681), 1312 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3681 transitions. [2022-03-15 22:22:57,116 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3681 transitions. Word has length 20 [2022-03-15 22:22:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:22:57,116 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 3681 transitions. [2022-03-15 22:22:57,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:22:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3681 transitions. [2022-03-15 22:22:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:22:57,117 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:22:57,117 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:22:57,133 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 22:22:57,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:57,333 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:22:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:22:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash -919477385, now seen corresponding path program 220 times [2022-03-15 22:22:57,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:22:57,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966828344] [2022-03-15 22:22:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:22:57,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:22:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:22:57,651 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 22:22:57,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:22:57,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966828344] [2022-03-15 22:22:57,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966828344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:22:57,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117174384] [2022-03-15 22:22:57,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:22:57,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:22:57,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:22:57,653 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 22:22:57,653 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 22:22:57,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:22:57,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:22:57,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:22:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:22:58,081 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 22:22:58,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:22:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:22:58,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117174384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:22:58,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:22:58,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 36 [2022-03-15 22:22:58,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [419122857] [2022-03-15 22:22:58,453 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:22:58,454 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:22:58,473 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 52 transitions. [2022-03-15 22:22:58,473 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:22:59,378 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [453967#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 453972#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* C 4) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= counter (* C 4))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= (+ C 1) counter))), 453966#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 453965#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 453969#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 453970#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 453963#(or (< j1 M1) (= counter 0)), 453971#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 453964#(or (< j2 M2) (< j1 M1) (= counter 0)), 453968#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:22:59,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 22:22:59,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:22:59,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 22:22:59,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2010, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:22:59,379 INFO L87 Difference]: Start difference. First operand 1313 states and 3681 transitions. Second operand has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:07,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:07,311 INFO L93 Difference]: Finished difference Result 1940 states and 4894 transitions. [2022-03-15 22:23:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-15 22:23:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:07,314 INFO L225 Difference]: With dead ends: 1940 [2022-03-15 22:23:07,314 INFO L226 Difference]: Without dead ends: 1927 [2022-03-15 22:23:07,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6117 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2784, Invalid=19866, Unknown=0, NotChecked=0, Total=22650 [2022-03-15 22:23:07,315 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 209 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:07,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 0 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 22:23:07,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2022-03-15 22:23:07,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1323. [2022-03-15 22:23:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 2.807110438729198) internal successors, (3711), 1322 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 3711 transitions. [2022-03-15 22:23:07,333 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 3711 transitions. Word has length 20 [2022-03-15 22:23:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:07,333 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 3711 transitions. [2022-03-15 22:23:07,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:07,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 3711 transitions. [2022-03-15 22:23:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:07,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:07,334 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:07,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-03-15 22:23:07,548 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,SelfDestructingSolverStorable221 [2022-03-15 22:23:07,548 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:07,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash -790394666, now seen corresponding path program 221 times [2022-03-15 22:23:07,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:07,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825081113] [2022-03-15 22:23:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:07,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:07,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:07,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825081113] [2022-03-15 22:23:07,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825081113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:07,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180155180] [2022-03-15 22:23:07,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:23:07,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:07,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:07,781 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 22:23:07,782 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 22:23:07,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:23:07,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:07,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 22:23:07,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:08,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:09,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180155180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:09,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:09,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 44 [2022-03-15 22:23:09,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [892206915] [2022-03-15 22:23:09,133 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:09,134 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:09,137 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 52 transitions. [2022-03-15 22:23:09,137 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:09,770 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [458925#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= j1 (+ 2 j2)) (not (< (+ j1 1) M1))) (or (<= 2 j1) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 458930#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= 0 j1)) (or (not (< (+ 3 j1) M1)) (<= j1 j2)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= j2 0))), 458928#(or (< j1 M1) (<= (+ 2 j2) M2)), 458929#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (<= j1 (+ j2 1)) (not (< (+ 2 j1) M1))) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 1 j1))), 458927#(or (< j1 M1) (<= (+ j2 1) M2)), 458932#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 458931#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 458933#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* 2 C) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= M2 (+ 2 j2))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter))), 458924#(and (or (not (< j1 M1)) (<= 3 j1)) (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 3 j2)))), 458926#(< j1 M1)] [2022-03-15 22:23:09,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 22:23:09,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:09,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 22:23:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2583, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 22:23:09,771 INFO L87 Difference]: Start difference. First operand 1323 states and 3711 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:11,712 INFO L93 Difference]: Finished difference Result 1584 states and 4187 transitions. [2022-03-15 22:23:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 22:23:11,712 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:11,714 INFO L225 Difference]: With dead ends: 1584 [2022-03-15 22:23:11,714 INFO L226 Difference]: Without dead ends: 1584 [2022-03-15 22:23:11,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=895, Invalid=6937, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 22:23:11,715 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 161 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:11,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 0 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:23:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2022-03-15 22:23:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1324. [2022-03-15 22:23:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 2.8072562358276643) internal successors, (3714), 1323 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3714 transitions. [2022-03-15 22:23:11,729 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3714 transitions. Word has length 20 [2022-03-15 22:23:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:11,729 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 3714 transitions. [2022-03-15 22:23:11,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3714 transitions. [2022-03-15 22:23:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:11,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:11,731 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:11,746 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 22:23:11,938 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,SelfDestructingSolverStorable222 [2022-03-15 22:23:11,938 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1606627105, now seen corresponding path program 222 times [2022-03-15 22:23:11,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:11,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543511916] [2022-03-15 22:23:11,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:11,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:12,132 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 22:23:12,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:12,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543511916] [2022-03-15 22:23:12,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543511916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:12,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361795428] [2022-03-15 22:23:12,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:23:12,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:12,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:12,134 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 22:23:12,135 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 22:23:12,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:23:12,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:12,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:23:12,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:12,565 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 22:23:12,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:23:12,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361795428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:12,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:12,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 33 [2022-03-15 22:23:12,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [786571253] [2022-03-15 22:23:12,830 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:12,831 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:12,834 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 48 transitions. [2022-03-15 22:23:12,834 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:13,401 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [463386#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 463389#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 463385#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 463391#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 463388#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 463383#(or (< j1 M1) (= counter 0)), 463387#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 463384#(or (< j2 M2) (< j1 M1) (= counter 0)), 463390#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:23:13,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 22:23:13,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 22:23:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:23:13,402 INFO L87 Difference]: Start difference. First operand 1324 states and 3714 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:18,347 INFO L93 Difference]: Finished difference Result 1873 states and 4797 transitions. [2022-03-15 22:23:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 22:23:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:18,350 INFO L225 Difference]: With dead ends: 1873 [2022-03-15 22:23:18,350 INFO L226 Difference]: Without dead ends: 1860 [2022-03-15 22:23:18,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3262 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1672, Invalid=12134, Unknown=0, NotChecked=0, Total=13806 [2022-03-15 22:23:18,350 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 192 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:18,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 0 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:23:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-03-15 22:23:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1329. [2022-03-15 22:23:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1328 states have (on average 2.8079819277108435) internal successors, (3729), 1328 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 3729 transitions. [2022-03-15 22:23:18,365 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 3729 transitions. Word has length 20 [2022-03-15 22:23:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:18,365 INFO L470 AbstractCegarLoop]: Abstraction has 1329 states and 3729 transitions. [2022-03-15 22:23:18,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 3729 transitions. [2022-03-15 22:23:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:18,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:18,367 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:18,382 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 22:23:18,582 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,SelfDestructingSolverStorable223 [2022-03-15 22:23:18,582 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash -190324254, now seen corresponding path program 223 times [2022-03-15 22:23:18,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:18,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712817673] [2022-03-15 22:23:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:18,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:18,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:18,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712817673] [2022-03-15 22:23:18,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712817673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:18,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954241957] [2022-03-15 22:23:18,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:23:18,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:18,753 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 22:23:18,754 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 22:23:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:18,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:23:18,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:19,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:23:19,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954241957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:19,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:19,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 36 [2022-03-15 22:23:19,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [647917904] [2022-03-15 22:23:19,330 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:19,330 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:19,333 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 48 transitions. [2022-03-15 22:23:19,333 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:19,747 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [468224#(or (< j1 M1) (<= (+ 2 j2) M2)), 468223#(or (< j1 M1) (<= (+ j2 1) M2)), 468228#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= j1 (+ j2 1)) (not (< (+ 2 j1) M1))) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 468227#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= j1 (+ 2 j2)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 468222#(< j1 M1), 468229#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= j1 j2)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1)))), 468225#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 468230#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 468226#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 3 j2))))] [2022-03-15 22:23:19,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 22:23:19,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 22:23:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:23:19,747 INFO L87 Difference]: Start difference. First operand 1329 states and 3729 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:21,818 INFO L93 Difference]: Finished difference Result 1595 states and 4210 transitions. [2022-03-15 22:23:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 22:23:21,818 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:21,820 INFO L225 Difference]: With dead ends: 1595 [2022-03-15 22:23:21,820 INFO L226 Difference]: Without dead ends: 1595 [2022-03-15 22:23:21,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=711, Invalid=5931, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 22:23:21,821 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 190 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:21,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 0 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:23:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2022-03-15 22:23:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1330. [2022-03-15 22:23:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 2.8088788562829197) internal successors, (3733), 1329 states have internal predecessors, (3733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 3733 transitions. [2022-03-15 22:23:21,835 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 3733 transitions. Word has length 20 [2022-03-15 22:23:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:21,835 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 3733 transitions. [2022-03-15 22:23:21,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:21,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 3733 transitions. [2022-03-15 22:23:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:21,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:21,836 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:21,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-03-15 22:23:22,051 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,SelfDestructingSolverStorable224 [2022-03-15 22:23:22,051 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:22,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2103756343, now seen corresponding path program 224 times [2022-03-15 22:23:22,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:22,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566703837] [2022-03-15 22:23:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:22,268 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 22:23:22,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:22,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566703837] [2022-03-15 22:23:22,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566703837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:22,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283490312] [2022-03-15 22:23:22,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:23:22,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:22,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:22,270 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 22:23:22,270 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 22:23:22,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:23:22,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:22,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:23:22,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:22,614 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 22:23:22,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:23:22,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283490312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:22,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:22,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 35 [2022-03-15 22:23:22,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1819507591] [2022-03-15 22:23:22,893 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:22,893 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:22,896 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 44 transitions. [2022-03-15 22:23:22,896 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:23,423 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [472711#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 472714#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 472709#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 472716#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 472715#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 472713#(or (< j2 M2) (< j1 M1) (= counter 0)), 472712#(or (< j1 M1) (= counter 0)), 472710#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:23:23,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:23:23,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:23,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:23:23,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:23:23,423 INFO L87 Difference]: Start difference. First operand 1330 states and 3733 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:26,375 INFO L93 Difference]: Finished difference Result 1708 states and 4463 transitions. [2022-03-15 22:23:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 22:23:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:26,377 INFO L225 Difference]: With dead ends: 1708 [2022-03-15 22:23:26,377 INFO L226 Difference]: Without dead ends: 1673 [2022-03-15 22:23:26,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=851, Invalid=5955, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 22:23:26,379 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 153 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:26,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 0 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:23:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-03-15 22:23:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1331. [2022-03-15 22:23:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 2.808270676691729) internal successors, (3735), 1330 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 3735 transitions. [2022-03-15 22:23:26,410 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 3735 transitions. Word has length 20 [2022-03-15 22:23:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:26,410 INFO L470 AbstractCegarLoop]: Abstraction has 1331 states and 3735 transitions. [2022-03-15 22:23:26,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 3735 transitions. [2022-03-15 22:23:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:26,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:26,411 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:26,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-03-15 22:23:26,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:26,623 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:26,624 INFO L85 PathProgramCache]: Analyzing trace with hash -375672897, now seen corresponding path program 225 times [2022-03-15 22:23:26,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:26,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755666337] [2022-03-15 22:23:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:26,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:26,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:26,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755666337] [2022-03-15 22:23:26,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755666337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:26,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317145637] [2022-03-15 22:23:26,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:23:26,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:26,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:26,849 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 22:23:26,849 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 22:23:26,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:23:26,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:23:26,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:23:27,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:23:27,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317145637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:27,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:27,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 33 [2022-03-15 22:23:27,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [53010033] [2022-03-15 22:23:27,426 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:27,427 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:27,429 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:23:27,429 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:27,615 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [477230#(< j2 M2), 477313#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 477314#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 477312#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 477311#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 22:23:27,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:23:27,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:23:27,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:23:27,616 INFO L87 Difference]: Start difference. First operand 1331 states and 3735 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 22:23:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:28,024 INFO L93 Difference]: Finished difference Result 2075 states and 5703 transitions. [2022-03-15 22:23:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:23:28,025 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 20 [2022-03-15 22:23:28,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:28,027 INFO L225 Difference]: With dead ends: 2075 [2022-03-15 22:23:28,027 INFO L226 Difference]: Without dead ends: 2074 [2022-03-15 22:23:28,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=474, Invalid=2496, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 22:23:28,028 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:28,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:23:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2022-03-15 22:23:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1329. [2022-03-15 22:23:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1328 states have (on average 2.8079819277108435) internal successors, (3729), 1328 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 3729 transitions. [2022-03-15 22:23:28,045 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 3729 transitions. Word has length 20 [2022-03-15 22:23:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:28,045 INFO L470 AbstractCegarLoop]: Abstraction has 1329 states and 3729 transitions. [2022-03-15 22:23:28,045 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 22:23:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 3729 transitions. [2022-03-15 22:23:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:28,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:28,047 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:28,062 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 22:23:28,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:28,262 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:28,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1907242838, now seen corresponding path program 226 times [2022-03-15 22:23:28,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:28,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278442139] [2022-03-15 22:23:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:28,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:28,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278442139] [2022-03-15 22:23:28,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278442139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:28,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968940073] [2022-03-15 22:23:28,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:23:28,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:28,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:28,435 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 22:23:28,436 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 22:23:28,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:23:28,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:28,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:23:28,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:28,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:23:28,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968940073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:28,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:28,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 36 [2022-03-15 22:23:28,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [466900609] [2022-03-15 22:23:28,988 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:28,989 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:28,991 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 44 transitions. [2022-03-15 22:23:28,991 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:29,360 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [482234#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 (+ 3 j2)))), 482237#(or (< j1 M1) (<= (+ j2 1) M2)), 482235#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= j1 (+ 2 j2)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 482240#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= j1 j2)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1)))), 482238#(or (< j1 M1) (<= (+ 2 j2) M2)), 482236#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= j1 (+ j2 1)) (not (< (+ 2 j1) M1))) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 482233#(< j1 M1), 482239#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2))] [2022-03-15 22:23:29,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:23:29,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:29,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:23:29,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:23:29,361 INFO L87 Difference]: Start difference. First operand 1329 states and 3729 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:31,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:31,103 INFO L93 Difference]: Finished difference Result 1566 states and 4164 transitions. [2022-03-15 22:23:31,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 22:23:31,104 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:31,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:31,106 INFO L225 Difference]: With dead ends: 1566 [2022-03-15 22:23:31,106 INFO L226 Difference]: Without dead ends: 1566 [2022-03-15 22:23:31,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=752, Invalid=6388, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 22:23:31,106 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 197 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:31,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 0 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:23:31,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-03-15 22:23:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1329. [2022-03-15 22:23:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1328 states have (on average 2.8079819277108435) internal successors, (3729), 1328 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 3729 transitions. [2022-03-15 22:23:31,120 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 3729 transitions. Word has length 20 [2022-03-15 22:23:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:31,120 INFO L470 AbstractCegarLoop]: Abstraction has 1329 states and 3729 transitions. [2022-03-15 22:23:31,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 3729 transitions. [2022-03-15 22:23:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:31,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:31,122 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:31,137 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 22:23:31,337 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,SelfDestructingSolverStorable227 [2022-03-15 22:23:31,337 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:31,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1011414113, now seen corresponding path program 227 times [2022-03-15 22:23:31,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:31,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987019539] [2022-03-15 22:23:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:31,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:31,518 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 22:23:31,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:31,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987019539] [2022-03-15 22:23:31,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987019539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:31,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574440848] [2022-03-15 22:23:31,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:23:31,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:31,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:31,520 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 22:23:31,520 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 22:23:31,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:23:31,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:31,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:23:31,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:31,868 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 22:23:31,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:32,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574440848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:32,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:32,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2022-03-15 22:23:32,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [580349098] [2022-03-15 22:23:32,531 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:32,532 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:32,535 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:23:32,535 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:32,872 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [486699#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 486704#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 486698#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 486700#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 486701#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 486702#(or (< j1 M1) (= counter 0)), 486703#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:23:32,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:23:32,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:23:32,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:23:32,872 INFO L87 Difference]: Start difference. First operand 1329 states and 3729 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:35,992 INFO L93 Difference]: Finished difference Result 1890 states and 4780 transitions. [2022-03-15 22:23:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 22:23:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:35,994 INFO L225 Difference]: With dead ends: 1890 [2022-03-15 22:23:35,995 INFO L226 Difference]: Without dead ends: 1868 [2022-03-15 22:23:35,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1106, Invalid=7636, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 22:23:35,995 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 175 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:35,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 0 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:23:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2022-03-15 22:23:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1324. [2022-03-15 22:23:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 2.817838246409675) internal successors, (3728), 1323 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3728 transitions. [2022-03-15 22:23:36,012 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3728 transitions. Word has length 20 [2022-03-15 22:23:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:36,012 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 3728 transitions. [2022-03-15 22:23:36,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3728 transitions. [2022-03-15 22:23:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:36,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:36,014 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:36,030 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 22:23:36,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-03-15 22:23:36,230 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:36,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:36,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1235268061, now seen corresponding path program 228 times [2022-03-15 22:23:36,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:36,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670700327] [2022-03-15 22:23:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:36,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:23:36,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:36,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670700327] [2022-03-15 22:23:36,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670700327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:36,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054492439] [2022-03-15 22:23:36,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:23:36,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:36,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:36,383 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 22:23:36,384 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 22:23:36,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:23:36,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:36,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:23:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:23:36,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:23:36,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054492439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:36,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:36,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2022-03-15 22:23:36,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1634092875] [2022-03-15 22:23:36,950 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:36,950 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:36,953 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:23:36,953 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:37,202 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [491489#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 491487#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 491488#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 491486#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 491405#(< j2 M2)] [2022-03-15 22:23:37,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:23:37,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:37,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:23:37,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:23:37,202 INFO L87 Difference]: Start difference. First operand 1324 states and 3728 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 22:23:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:37,662 INFO L93 Difference]: Finished difference Result 1920 states and 5282 transitions. [2022-03-15 22:23:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:23:37,662 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 20 [2022-03-15 22:23:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:37,665 INFO L225 Difference]: With dead ends: 1920 [2022-03-15 22:23:37,665 INFO L226 Difference]: Without dead ends: 1919 [2022-03-15 22:23:37,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=447, Invalid=2205, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 22:23:37,665 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:37,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:23:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2022-03-15 22:23:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1351. [2022-03-15 22:23:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 2.8125925925925928) internal successors, (3797), 1350 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 3797 transitions. [2022-03-15 22:23:37,682 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 3797 transitions. Word has length 20 [2022-03-15 22:23:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:37,682 INFO L470 AbstractCegarLoop]: Abstraction has 1351 states and 3797 transitions. [2022-03-15 22:23:37,682 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 22:23:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 3797 transitions. [2022-03-15 22:23:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:37,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:37,683 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:37,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-03-15 22:23:37,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:37,886 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:37,886 INFO L85 PathProgramCache]: Analyzing trace with hash -796040350, now seen corresponding path program 229 times [2022-03-15 22:23:37,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:37,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558615331] [2022-03-15 22:23:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:37,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:38,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:38,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558615331] [2022-03-15 22:23:38,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558615331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:38,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880373580] [2022-03-15 22:23:38,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:23:38,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:38,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:38,165 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 22:23:38,166 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 22:23:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:38,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:23:38,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:38,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:23:38,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880373580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:38,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:38,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 34 [2022-03-15 22:23:38,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [86306287] [2022-03-15 22:23:38,773 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:38,774 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:38,777 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:23:38,777 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:39,138 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [496292#(and (or (not (<= C 0)) (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= j1 (+ 2 j2)) (not (< (+ j1 1) M1)))), 496297#(and (or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)) (or (<= M2 j2) (< j1 M1) (<= C 0))), 496294#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= j1 j2)) (or (not (<= C 0)) (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (= M2 M1)) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 496293#(and (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (not (<= C 0)) (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= j1 (+ j2 1)) (not (< (+ 2 j1) M1))) (or (<= C counter) (not (< (+ 2 j1) M1)))), 496291#(and (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (<= j1 (+ 3 j2))) (or (not (< j1 M1)) (= M2 M1)) (or (not (<= C 0)) (not (< j1 M1)) (<= (+ 3 j2) j1))), 496295#(< j1 M1), 496296#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:23:39,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:23:39,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:39,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:23:39,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:23:39,139 INFO L87 Difference]: Start difference. First operand 1351 states and 3797 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:40,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:40,939 INFO L93 Difference]: Finished difference Result 1538 states and 4116 transitions. [2022-03-15 22:23:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 22:23:40,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:40,941 INFO L225 Difference]: With dead ends: 1538 [2022-03-15 22:23:40,941 INFO L226 Difference]: Without dead ends: 1537 [2022-03-15 22:23:40,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=637, Invalid=4333, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 22:23:40,941 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:40,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:23:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-03-15 22:23:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1365. [2022-03-15 22:23:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 2.815982404692082) internal successors, (3841), 1364 states have internal predecessors, (3841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:40,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 3841 transitions. [2022-03-15 22:23:40,955 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 3841 transitions. Word has length 20 [2022-03-15 22:23:40,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:40,955 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 3841 transitions. [2022-03-15 22:23:40,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 3841 transitions. [2022-03-15 22:23:40,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:40,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:40,956 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:40,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-03-15 22:23:41,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:41,170 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:41,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:41,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1114724599, now seen corresponding path program 230 times [2022-03-15 22:23:41,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:41,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122978205] [2022-03-15 22:23:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:41,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:41,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:41,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122978205] [2022-03-15 22:23:41,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122978205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:41,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381359291] [2022-03-15 22:23:41,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:23:41,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:41,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:41,338 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 22:23:41,339 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 22:23:41,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:23:41,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:41,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 22:23:41,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:41,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:42,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381359291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:42,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:42,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-03-15 22:23:42,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1600375158] [2022-03-15 22:23:42,784 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:42,784 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:42,787 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 22:23:42,787 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:43,043 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [500782#(< j1 M1), 500780#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 500781#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 500784#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 500783#(or (< j1 M1) (<= (+ j2 1) M2)), 500779#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 22:23:43,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:23:43,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:43,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:23:43,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1770, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:23:43,044 INFO L87 Difference]: Start difference. First operand 1365 states and 3841 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 22:23:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:44,433 INFO L93 Difference]: Finished difference Result 2388 states and 6354 transitions. [2022-03-15 22:23:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 22:23:44,433 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:44,460 INFO L225 Difference]: With dead ends: 2388 [2022-03-15 22:23:44,460 INFO L226 Difference]: Without dead ends: 2388 [2022-03-15 22:23:44,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1179, Invalid=4983, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 22:23:44,461 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 150 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:44,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 0 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:23:44,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2022-03-15 22:23:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1446. [2022-03-15 22:23:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 2.83598615916955) internal successors, (4098), 1445 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4098 transitions. [2022-03-15 22:23:44,479 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4098 transitions. Word has length 20 [2022-03-15 22:23:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:44,479 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4098 transitions. [2022-03-15 22:23:44,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 22:23:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4098 transitions. [2022-03-15 22:23:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:44,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:44,480 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:44,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-03-15 22:23:44,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:44,694 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1437432362, now seen corresponding path program 231 times [2022-03-15 22:23:44,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:44,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886926074] [2022-03-15 22:23:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:44,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:44,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:44,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886926074] [2022-03-15 22:23:44,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886926074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:44,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874857431] [2022-03-15 22:23:44,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:23:44,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:44,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:44,899 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 22:23:44,900 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 22:23:44,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:23:44,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:44,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:23:44,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:23:45,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:46,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874857431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:46,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:46,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:23:46,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [335779617] [2022-03-15 22:23:46,399 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:46,400 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:46,403 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 22:23:46,403 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:46,701 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [506282#(and (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= 2 j1) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 506285#(or (< j2 M2) (< j1 M1) (= counter 0)), 506284#(or (< j1 M1) (= counter 0)), 506281#(and (or (not (< j1 M1)) (<= 3 j1)) (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 506283#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 1 j1))), 506286#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= 0 j1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= j2 0)) (or (not (< (+ 3 j1) M1)) (<= counter 0)))] [2022-03-15 22:23:46,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:23:46,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:23:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:23:46,702 INFO L87 Difference]: Start difference. First operand 1446 states and 4098 transitions. Second operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 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 22:23:49,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:49,585 INFO L93 Difference]: Finished difference Result 1850 states and 4833 transitions. [2022-03-15 22:23:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 22:23:49,585 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:49,587 INFO L225 Difference]: With dead ends: 1850 [2022-03-15 22:23:49,588 INFO L226 Difference]: Without dead ends: 1843 [2022-03-15 22:23:49,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=947, Invalid=6535, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 22:23:49,588 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 170 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:49,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 0 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:23:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2022-03-15 22:23:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1448. [2022-03-15 22:23:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 2.8362128541810643) internal successors, (4104), 1447 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4104 transitions. [2022-03-15 22:23:49,605 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4104 transitions. Word has length 20 [2022-03-15 22:23:49,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:49,605 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 4104 transitions. [2022-03-15 22:23:49,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 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 22:23:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4104 transitions. [2022-03-15 22:23:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:49,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:49,607 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:49,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-15 22:23:49,819 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,SelfDestructingSolverStorable232 [2022-03-15 22:23:49,819 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:49,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:49,819 INFO L85 PathProgramCache]: Analyzing trace with hash -572186402, now seen corresponding path program 232 times [2022-03-15 22:23:49,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:49,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431459265] [2022-03-15 22:23:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:49,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:50,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:50,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431459265] [2022-03-15 22:23:50,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431459265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:50,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544379318] [2022-03-15 22:23:50,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:23:50,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:50,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:50,048 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 22:23:50,048 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 22:23:50,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:23:50,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:50,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:23:50,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:23:50,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:23:50,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544379318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:50,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:50,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2022-03-15 22:23:50,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1103424271] [2022-03-15 22:23:50,520 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:50,521 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:50,524 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:23:50,524 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:50,770 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [511270#(and (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= (* 2 C) counter)) (or (<= counter (* 2 C)) (not (< (+ j1 1) M1))) (or (<= j1 (+ 2 j2)) (not (< (+ j1 1) M1))) (or (<= 2 j1) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1)))), 511271#(or (< j2 M2) (< j1 M1)), 511273#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (<= 0 j1)) (or (not (< (+ 3 j1) M1)) (<= j1 j2)) (or (not (< (+ 3 j1) M1)) (<= j2 0)) (or (not (< (+ 3 j1) M1)) (= M2 M1)) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 511187#(< j2 M2), 511269#(and (or (not (< j1 M1)) (<= 3 j1)) (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= counter (* 3 C))) (or (not (< j1 M1)) (<= (* 3 C) counter)) (or (not (< j1 M1)) (<= j1 (+ 3 j2))) (or (not (< j1 M1)) (= M2 M1))), 511272#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (not (< (+ 2 j1) M1)) (<= counter C)) (or (<= j1 (+ j2 1)) (not (< (+ 2 j1) M1))) (or (<= C counter) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 1 j1)))] [2022-03-15 22:23:50,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:23:50,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:50,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:23:50,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:23:50,771 INFO L87 Difference]: Start difference. First operand 1448 states and 4104 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 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 22:23:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:51,901 INFO L93 Difference]: Finished difference Result 1510 states and 4222 transitions. [2022-03-15 22:23:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 22:23:51,901 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:51,903 INFO L225 Difference]: With dead ends: 1510 [2022-03-15 22:23:51,903 INFO L226 Difference]: Without dead ends: 1510 [2022-03-15 22:23:51,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=587, Invalid=3573, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:23:51,903 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 132 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:51,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 0 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:23:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2022-03-15 22:23:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1450. [2022-03-15 22:23:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 2.835058661145618) internal successors, (4108), 1449 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:51,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4108 transitions. [2022-03-15 22:23:51,918 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4108 transitions. Word has length 20 [2022-03-15 22:23:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:51,918 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 4108 transitions. [2022-03-15 22:23:51,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 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 22:23:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4108 transitions. [2022-03-15 22:23:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:51,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:51,919 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:51,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-03-15 22:23:52,134 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,SelfDestructingSolverStorable233 [2022-03-15 22:23:52,134 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:52,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1349878160, now seen corresponding path program 233 times [2022-03-15 22:23:52,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:52,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048565295] [2022-03-15 22:23:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:52,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:52,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:52,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048565295] [2022-03-15 22:23:52,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048565295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:52,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647881141] [2022-03-15 22:23:52,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:23:52,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:52,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:52,353 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 22:23:52,354 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 22:23:52,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:23:52,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 22:23:52,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:53,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:23:53,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647881141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:53,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:53,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-03-15 22:23:53,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [877842095] [2022-03-15 22:23:53,930 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:53,931 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:53,934 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 54 transitions. [2022-03-15 22:23:53,934 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:54,825 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [515891#(and (or (<= j1 j2) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= j2 0) (not (<= (+ (* 3 C) counter) 0)) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 515898#(and (or (<= j2 0) (< j1 M1) (<= 1 counter)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 3 j2))) (or (< j1 M1) (<= 1 counter) (<= 5 M2)) (or (<= counter 0) (< j1 M1) (<= (* 3 C) counter))), 515890#(and (or (<= j1 (+ j2 1)) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= j2 0) (not (<= (+ (* 2 C) counter) 0)) (not (< (+ j1 1) M1))) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 515897#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* 2 C) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= M2 (+ 2 j2))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter))), 515889#(and (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= j2 0) (not (<= (+ C counter) 0))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (<= j1 (+ 2 j2)))), 515892#(< j1 M1), 515896#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 515894#(or (< j1 M1) (<= (+ 2 j2) M2)), 515893#(or (< j1 M1) (<= (+ j2 1) M2)), 515895#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2))] [2022-03-15 22:23:54,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 22:23:54,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:54,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 22:23:54,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2382, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:23:54,825 INFO L87 Difference]: Start difference. First operand 1450 states and 4108 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:23:56,443 INFO L93 Difference]: Finished difference Result 1626 states and 4457 transitions. [2022-03-15 22:23:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 22:23:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:23:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:23:56,446 INFO L225 Difference]: With dead ends: 1626 [2022-03-15 22:23:56,446 INFO L226 Difference]: Without dead ends: 1626 [2022-03-15 22:23:56,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=703, Invalid=5617, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 22:23:56,447 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:23:56,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:23:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2022-03-15 22:23:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1447. [2022-03-15 22:23:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1446 states have (on average 2.834716459197787) internal successors, (4099), 1446 states have internal predecessors, (4099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 4099 transitions. [2022-03-15 22:23:56,465 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 4099 transitions. Word has length 20 [2022-03-15 22:23:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:23:56,466 INFO L470 AbstractCegarLoop]: Abstraction has 1447 states and 4099 transitions. [2022-03-15 22:23:56,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:23:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 4099 transitions. [2022-03-15 22:23:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:23:56,467 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:23:56,467 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:23:56,484 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 22:23:56,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:56,684 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:23:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:23:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash -56647291, now seen corresponding path program 234 times [2022-03-15 22:23:56,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:23:56,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185221047] [2022-03-15 22:23:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:23:56,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:23:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:23:56,998 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 22:23:56,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:23:56,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185221047] [2022-03-15 22:23:56,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185221047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:23:56,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785777048] [2022-03-15 22:23:56,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:23:56,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:23:56,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:23:56,999 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 22:23:57,000 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 22:23:57,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:23:57,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:23:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:23:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:23:57,591 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 22:23:57,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:23:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:23:58,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785777048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:23:58,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:23:58,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 36 [2022-03-15 22:23:58,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [912308090] [2022-03-15 22:23:58,034 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:23:58,034 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:23:58,037 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 50 transitions. [2022-03-15 22:23:58,037 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:23:58,996 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [520632#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* C 4) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= counter (* C 4))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= (+ C 1) counter))), 520629#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 520626#(or (< j2 M2) (< j1 M1) (= counter 0)), 520628#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 520633#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 520627#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 520631#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 520625#(or (< j1 M1) (= counter 0)), 520630#(and (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter)))] [2022-03-15 22:23:58,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 22:23:58,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:23:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 22:23:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:23:58,997 INFO L87 Difference]: Start difference. First operand 1447 states and 4099 transitions. Second operand has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:06,100 INFO L93 Difference]: Finished difference Result 2121 states and 5468 transitions. [2022-03-15 22:24:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-15 22:24:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:06,103 INFO L225 Difference]: With dead ends: 2121 [2022-03-15 22:24:06,103 INFO L226 Difference]: Without dead ends: 2111 [2022-03-15 22:24:06,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4715 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2122, Invalid=16784, Unknown=0, NotChecked=0, Total=18906 [2022-03-15 22:24:06,103 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 199 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:06,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 0 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 22:24:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2022-03-15 22:24:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1471. [2022-03-15 22:24:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.8374149659863948) internal successors, (4171), 1470 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4171 transitions. [2022-03-15 22:24:06,120 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4171 transitions. Word has length 20 [2022-03-15 22:24:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:06,120 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 4171 transitions. [2022-03-15 22:24:06,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4171 transitions. [2022-03-15 22:24:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:06,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:06,122 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:06,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:06,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-15 22:24:06,337 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:06,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:06,338 INFO L85 PathProgramCache]: Analyzing trace with hash -574602268, now seen corresponding path program 235 times [2022-03-15 22:24:06,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:06,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106998580] [2022-03-15 22:24:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:06,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:06,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:06,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106998580] [2022-03-15 22:24:06,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106998580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:06,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333529662] [2022-03-15 22:24:06,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:24:06,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:06,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:06,632 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 22:24:06,633 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 22:24:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:06,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:24:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:24:07,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:08,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333529662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:08,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:08,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 36 [2022-03-15 22:24:08,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [111763254] [2022-03-15 22:24:08,045 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:08,046 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:08,048 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:24:08,048 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:08,335 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [526033#(and (or (< j1 M1) (< 4 M2)) (or (< j1 M1) (= counter 0) (<= j2 4))), 526034#(and (or (<= M2 4) (<= C counter) (not (< (+ j1 1) M1))) (or (<= M2 4) (<= j2 0) (not (< (+ j1 1) M1))) (or (<= M2 4) (not (< (+ j1 1) M1)) (<= counter C)) (or (not (<= M2 4)) (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (not (<= M2 4)) (not (< (+ j1 1) M1)) (<= 1 j1))), 526031#(and (or (not (<= M2 4)) (not (< j1 M1)) (<= 2 j1)) (or (<= M2 4) (<= counter (* 2 C)) (not (< j1 M1))) (or (<= M2 4) (not (< j1 M1)) (<= j2 0)) (or (not (<= M2 4)) (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M2 4) (not (< j1 M1)) (<= (* 2 C) counter))), 526032#(or (< j1 M1) (= counter 0)), 526035#(and (or (<= M2 4) (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (<= M2 4)) (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= M2 4) (<= counter 0) (not (< (+ 2 j1) M1))) (or (not (<= M2 4)) (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= M2 4) (<= 0 counter) (not (< (+ 2 j1) M1))))] [2022-03-15 22:24:08,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:24:08,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:08,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:24:08,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:24:08,336 INFO L87 Difference]: Start difference. First operand 1471 states and 4171 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 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 22:24:09,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:09,554 INFO L93 Difference]: Finished difference Result 1692 states and 4610 transitions. [2022-03-15 22:24:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:24:09,555 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:09,557 INFO L225 Difference]: With dead ends: 1692 [2022-03-15 22:24:09,557 INFO L226 Difference]: Without dead ends: 1680 [2022-03-15 22:24:09,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=489, Invalid=3417, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 22:24:09,557 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:09,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:24:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2022-03-15 22:24:09,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1471. [2022-03-15 22:24:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.8374149659863948) internal successors, (4171), 1470 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4171 transitions. [2022-03-15 22:24:09,580 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4171 transitions. Word has length 20 [2022-03-15 22:24:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:09,580 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 4171 transitions. [2022-03-15 22:24:09,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 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 22:24:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4171 transitions. [2022-03-15 22:24:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:09,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:09,582 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:09,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:09,797 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,SelfDestructingSolverStorable236 [2022-03-15 22:24:09,797 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:09,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:09,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2046971473, now seen corresponding path program 236 times [2022-03-15 22:24:09,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:09,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836983035] [2022-03-15 22:24:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:09,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:10,001 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 22:24:10,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:10,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836983035] [2022-03-15 22:24:10,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836983035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:10,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892514578] [2022-03-15 22:24:10,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:24:10,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:10,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:10,003 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 22:24:10,014 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 22:24:10,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:24:10,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:10,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:24:10,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:10,561 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 22:24:10,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:24:10,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892514578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:10,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:10,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 33 [2022-03-15 22:24:10,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1651623498] [2022-03-15 22:24:10,982 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:10,983 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:10,986 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 46 transitions. [2022-03-15 22:24:10,986 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:11,785 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [530865#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 530861#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 530859#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 530862#(or (< j1 M1) (= counter 0)), 530863#(or (< j2 M2) (< j1 M1) (= counter 0)), 530864#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 530866#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2))), 530860#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:24:11,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:24:11,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:11,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:24:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:24:11,786 INFO L87 Difference]: Start difference. First operand 1471 states and 4171 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:16,755 INFO L93 Difference]: Finished difference Result 1995 states and 5234 transitions. [2022-03-15 22:24:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 22:24:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:16,757 INFO L225 Difference]: With dead ends: 1995 [2022-03-15 22:24:16,757 INFO L226 Difference]: Without dead ends: 1985 [2022-03-15 22:24:16,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1369, Invalid=10403, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 22:24:16,758 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 162 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:16,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 0 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:24:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-03-15 22:24:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1471. [2022-03-15 22:24:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.8374149659863948) internal successors, (4171), 1470 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4171 transitions. [2022-03-15 22:24:16,775 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4171 transitions. Word has length 20 [2022-03-15 22:24:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:16,775 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 4171 transitions. [2022-03-15 22:24:16,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4171 transitions. [2022-03-15 22:24:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:16,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:16,776 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:16,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:16,990 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,SelfDestructingSolverStorable237 [2022-03-15 22:24:16,990 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:16,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1555068967, now seen corresponding path program 237 times [2022-03-15 22:24:16,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:16,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143763883] [2022-03-15 22:24:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:16,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:17,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:17,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143763883] [2022-03-15 22:24:17,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143763883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:17,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602609158] [2022-03-15 22:24:17,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:24:17,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:17,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:17,143 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 22:24:17,144 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 22:24:17,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:24:17,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:17,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 22:24:17,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:17,688 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 22:24:17,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:18,537 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 22:24:18,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602609158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:18,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:18,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 38 [2022-03-15 22:24:18,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [406754903] [2022-03-15 22:24:18,538 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:18,539 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:18,541 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:24:18,541 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:18,726 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [536092#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 536089#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 536093#(or (< j1 M1) (<= (+ j2 1) M2)), 536091#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 536090#(< j1 M1)] [2022-03-15 22:24:18,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:24:18,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:18,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:24:18,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:24:18,726 INFO L87 Difference]: Start difference. First operand 1471 states and 4171 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:19,798 INFO L93 Difference]: Finished difference Result 2730 states and 7332 transitions. [2022-03-15 22:24:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 22:24:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:19,802 INFO L225 Difference]: With dead ends: 2730 [2022-03-15 22:24:19,802 INFO L226 Difference]: Without dead ends: 2726 [2022-03-15 22:24:19,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1114, Invalid=3998, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 22:24:19,802 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:19,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:24:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-03-15 22:24:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1532. [2022-03-15 22:24:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 2.851730894839974) internal successors, (4366), 1531 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 4366 transitions. [2022-03-15 22:24:19,822 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 4366 transitions. Word has length 20 [2022-03-15 22:24:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:19,822 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 4366 transitions. [2022-03-15 22:24:19,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 4366 transitions. [2022-03-15 22:24:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:19,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:19,824 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:19,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:20,039 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,SelfDestructingSolverStorable238 [2022-03-15 22:24:20,039 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:20,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash -997087994, now seen corresponding path program 238 times [2022-03-15 22:24:20,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:20,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823348610] [2022-03-15 22:24:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:24:20,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:20,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823348610] [2022-03-15 22:24:20,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823348610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:20,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124722140] [2022-03-15 22:24:20,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:24:20,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:20,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:20,181 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 22:24:20,181 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 22:24:20,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:24:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:24:20,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:24:20,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:21,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124722140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:21,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:21,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 33 [2022-03-15 22:24:21,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [898374843] [2022-03-15 22:24:21,390 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:21,391 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:21,393 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:24:21,393 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:21,658 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [542094#(or (< j1 M1) (= counter 0)), 542095#(or (< j2 M2) (< j1 M1) (= counter 0)), 542097#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 542096#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 542093#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1))))] [2022-03-15 22:24:21,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:24:21,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:21,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:24:21,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:24:21,658 INFO L87 Difference]: Start difference. First operand 1532 states and 4366 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) 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 22:24:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:22,668 INFO L93 Difference]: Finished difference Result 1684 states and 4630 transitions. [2022-03-15 22:24:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:24:22,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) 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 20 [2022-03-15 22:24:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:22,670 INFO L225 Difference]: With dead ends: 1684 [2022-03-15 22:24:22,670 INFO L226 Difference]: Without dead ends: 1672 [2022-03-15 22:24:22,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=480, Invalid=2826, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 22:24:22,670 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:22,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:24:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-03-15 22:24:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1532. [2022-03-15 22:24:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 2.851730894839974) internal successors, (4366), 1531 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 4366 transitions. [2022-03-15 22:24:22,686 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 4366 transitions. Word has length 20 [2022-03-15 22:24:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:22,686 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 4366 transitions. [2022-03-15 22:24:22,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) 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 22:24:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 4366 transitions. [2022-03-15 22:24:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:22,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:22,688 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:22,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:22,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:22,903 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:22,904 INFO L85 PathProgramCache]: Analyzing trace with hash 175167493, now seen corresponding path program 239 times [2022-03-15 22:24:22,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:22,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085626149] [2022-03-15 22:24:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:22,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:23,087 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 22:24:23,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:23,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085626149] [2022-03-15 22:24:23,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085626149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:23,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506636384] [2022-03-15 22:24:23,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:24:23,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:23,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:23,089 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 22:24:23,091 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 22:24:23,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:24:23,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:24:23,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:23,428 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 22:24:23,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:24,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506636384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:24,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:24,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-03-15 22:24:24,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1143273354] [2022-03-15 22:24:24,015 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:24,016 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:24,018 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:24:24,018 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:24,547 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [547036#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 547035#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 547038#(or (< j2 M2) (< j1 M1) (= counter 0)), 547040#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2))), 547034#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 547039#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 547037#(or (< j1 M1) (= counter 0))] [2022-03-15 22:24:24,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:24:24,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:24,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:24:24,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:24:24,547 INFO L87 Difference]: Start difference. First operand 1532 states and 4366 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:27,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:27,042 INFO L93 Difference]: Finished difference Result 2034 states and 5399 transitions. [2022-03-15 22:24:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 22:24:27,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:27,045 INFO L225 Difference]: With dead ends: 2034 [2022-03-15 22:24:27,045 INFO L226 Difference]: Without dead ends: 2006 [2022-03-15 22:24:27,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=963, Invalid=7047, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 22:24:27,046 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 132 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:27,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 0 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:24:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2022-03-15 22:24:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1532. [2022-03-15 22:24:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 2.851730894839974) internal successors, (4366), 1531 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 4366 transitions. [2022-03-15 22:24:27,071 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 4366 transitions. Word has length 20 [2022-03-15 22:24:27,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:27,071 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 4366 transitions. [2022-03-15 22:24:27,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 4366 transitions. [2022-03-15 22:24:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:27,072 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:27,072 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:27,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:27,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:27,288 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -813864251, now seen corresponding path program 240 times [2022-03-15 22:24:27,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:27,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548531985] [2022-03-15 22:24:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:27,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:27,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:27,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548531985] [2022-03-15 22:24:27,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548531985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:27,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923443154] [2022-03-15 22:24:27,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:24:27,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:27,465 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 22:24:27,466 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 22:24:27,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:24:27,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:27,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 22:24:27,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:27,936 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 22:24:27,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:28,770 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 22:24:28,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923443154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:28,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:28,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 39 [2022-03-15 22:24:28,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1359275978] [2022-03-15 22:24:28,770 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:28,771 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:28,774 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:24:28,774 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:28,970 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [552384#(< j1 M1), 552387#(or (< j1 M1) (<= (+ j2 1) M2)), 552386#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 552383#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (= M2 M1))), 552385#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:24:28,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:24:28,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:28,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:24:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:24:28,971 INFO L87 Difference]: Start difference. First operand 1532 states and 4366 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 22:24:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:30,321 INFO L93 Difference]: Finished difference Result 2484 states and 6634 transitions. [2022-03-15 22:24:30,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 22:24:30,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:30,325 INFO L225 Difference]: With dead ends: 2484 [2022-03-15 22:24:30,325 INFO L226 Difference]: Without dead ends: 2474 [2022-03-15 22:24:30,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1187, Invalid=4215, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 22:24:30,325 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 141 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:30,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 0 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:24:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-03-15 22:24:30,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1635. [2022-03-15 22:24:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 2.8745410036719705) internal successors, (4697), 1634 states have internal predecessors, (4697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 4697 transitions. [2022-03-15 22:24:30,347 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 4697 transitions. Word has length 20 [2022-03-15 22:24:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:30,347 INFO L470 AbstractCegarLoop]: Abstraction has 1635 states and 4697 transitions. [2022-03-15 22:24:30,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 22:24:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 4697 transitions. [2022-03-15 22:24:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:30,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:30,349 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:30,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:30,564 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,SelfDestructingSolverStorable241 [2022-03-15 22:24:30,564 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash 928946084, now seen corresponding path program 241 times [2022-03-15 22:24:30,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:30,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626654086] [2022-03-15 22:24:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:30,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:30,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626654086] [2022-03-15 22:24:30,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626654086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:30,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343227355] [2022-03-15 22:24:30,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:24:30,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:30,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:30,771 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 22:24:30,772 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 22:24:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:30,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:24:30,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:24:31,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:32,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343227355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:32,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:32,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:24:32,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1200302189] [2022-03-15 22:24:32,055 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:32,056 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:32,058 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:24:32,058 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:32,277 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [558355#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 558352#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 558354#(or (< j2 M2) (< j1 M1) (= counter 0)), 558353#(or (< j1 M1) (= counter 0)), 558356#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:24:32,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:24:32,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:32,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:24:32,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:24:32,278 INFO L87 Difference]: Start difference. First operand 1635 states and 4697 transitions. Second operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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 22:24:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:33,278 INFO L93 Difference]: Finished difference Result 1785 states and 4954 transitions. [2022-03-15 22:24:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 22:24:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:33,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:33,280 INFO L225 Difference]: With dead ends: 1785 [2022-03-15 22:24:33,280 INFO L226 Difference]: Without dead ends: 1773 [2022-03-15 22:24:33,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=579, Invalid=3581, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:24:33,281 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:33,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:24:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2022-03-15 22:24:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1636. [2022-03-15 22:24:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 2.874006116207951) internal successors, (4699), 1635 states have internal predecessors, (4699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 4699 transitions. [2022-03-15 22:24:33,299 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 4699 transitions. Word has length 20 [2022-03-15 22:24:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:33,299 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 4699 transitions. [2022-03-15 22:24:33,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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 22:24:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 4699 transitions. [2022-03-15 22:24:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:33,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:33,300 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:33,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:33,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:33,508 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1777354705, now seen corresponding path program 242 times [2022-03-15 22:24:33,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:33,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695189677] [2022-03-15 22:24:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:33,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:33,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695189677] [2022-03-15 22:24:33,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695189677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:33,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077130944] [2022-03-15 22:24:33,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:24:33,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:33,641 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 22:24:33,642 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 22:24:33,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:24:33,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:33,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 22:24:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:34,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:34,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077130944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:34,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:34,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2022-03-15 22:24:34,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1387105158] [2022-03-15 22:24:34,665 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:34,666 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:34,668 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 22:24:34,668 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:34,886 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [563617#(or (< j1 M1) (<= (+ 2 j2) M2)), 563614#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 563612#(< j1 M1), 563615#(and (or (not (< (+ j1 1) M1)) (<= counter C)) (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 563613#(or (< j1 M1) (<= (+ j2 1) M2)), 563616#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:24:34,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:24:34,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:34,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:24:34,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:24:34,886 INFO L87 Difference]: Start difference. First operand 1636 states and 4699 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 22:24:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:35,713 INFO L93 Difference]: Finished difference Result 2322 states and 6367 transitions. [2022-03-15 22:24:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:24:35,713 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 20 [2022-03-15 22:24:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:35,715 INFO L225 Difference]: With dead ends: 2322 [2022-03-15 22:24:35,715 INFO L226 Difference]: Without dead ends: 2322 [2022-03-15 22:24:35,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=912, Invalid=3780, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 22:24:35,716 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:35,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:24:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-03-15 22:24:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1686. [2022-03-15 22:24:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.879525222551929) internal successors, (4852), 1685 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 4852 transitions. [2022-03-15 22:24:35,735 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 4852 transitions. Word has length 20 [2022-03-15 22:24:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:35,735 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 4852 transitions. [2022-03-15 22:24:35,735 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 22:24:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 4852 transitions. [2022-03-15 22:24:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:35,737 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:35,737 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:35,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:35,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:35,952 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:35,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash -671491770, now seen corresponding path program 243 times [2022-03-15 22:24:35,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:35,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801486037] [2022-03-15 22:24:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:35,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:36,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:36,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801486037] [2022-03-15 22:24:36,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801486037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:36,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110846400] [2022-03-15 22:24:36,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:24:36,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:36,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:36,154 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 22:24:36,154 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 22:24:36,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:24:36,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:36,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:24:36,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:36,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:37,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110846400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:37,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:37,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:24:37,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [771498453] [2022-03-15 22:24:37,365 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:37,365 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:37,368 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:24:37,368 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:37,570 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [569512#(or (< j2 M2) (< j1 M1) (= counter 0)), 569511#(or (< j1 M1) (= counter 0)), 569513#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 569510#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 569514#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1))))] [2022-03-15 22:24:37,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:24:37,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:37,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:24:37,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:24:37,571 INFO L87 Difference]: Start difference. First operand 1686 states and 4852 transitions. Second operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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 22:24:38,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:38,921 INFO L93 Difference]: Finished difference Result 1936 states and 5323 transitions. [2022-03-15 22:24:38,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 22:24:38,921 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:38,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:38,924 INFO L225 Difference]: With dead ends: 1936 [2022-03-15 22:24:38,924 INFO L226 Difference]: Without dead ends: 1924 [2022-03-15 22:24:38,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=664, Invalid=4028, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 22:24:38,924 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:38,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:24:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2022-03-15 22:24:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1686. [2022-03-15 22:24:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.879525222551929) internal successors, (4852), 1685 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 4852 transitions. [2022-03-15 22:24:38,943 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 4852 transitions. Word has length 20 [2022-03-15 22:24:38,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:38,944 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 4852 transitions. [2022-03-15 22:24:38,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 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 22:24:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 4852 transitions. [2022-03-15 22:24:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:38,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:38,945 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:38,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:39,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:39,161 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:39,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:39,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1580841200, now seen corresponding path program 244 times [2022-03-15 22:24:39,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:39,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485892813] [2022-03-15 22:24:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:39,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:39,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:39,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485892813] [2022-03-15 22:24:39,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485892813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:39,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347223334] [2022-03-15 22:24:39,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:24:39,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:39,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:39,370 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 22:24:39,370 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 22:24:39,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:24:39,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:24:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:24:39,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:40,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347223334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:40,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:40,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:24:40,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [762293724] [2022-03-15 22:24:40,504 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:40,504 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:40,507 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 22:24:40,507 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:40,867 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [575032#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 575029#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 575030#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1)))), 575027#(or (< j1 M1) (= counter 0)), 575028#(or (< j2 M2) (< j1 M1) (= counter 0)), 575031#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:24:40,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:24:40,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:24:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:24:40,868 INFO L87 Difference]: Start difference. First operand 1686 states and 4852 transitions. Second operand has 23 states, 22 states have (on average 1.5909090909090908) 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 22:24:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:43,386 INFO L93 Difference]: Finished difference Result 2037 states and 5540 transitions. [2022-03-15 22:24:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 22:24:43,387 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5909090909090908) 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 20 [2022-03-15 22:24:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:43,389 INFO L225 Difference]: With dead ends: 2037 [2022-03-15 22:24:43,390 INFO L226 Difference]: Without dead ends: 2003 [2022-03-15 22:24:43,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=829, Invalid=5491, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 22:24:43,390 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:43,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 0 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:24:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-03-15 22:24:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1692. [2022-03-15 22:24:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 2.8764044943820224) internal successors, (4864), 1691 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 4864 transitions. [2022-03-15 22:24:43,415 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 4864 transitions. Word has length 20 [2022-03-15 22:24:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:43,415 INFO L470 AbstractCegarLoop]: Abstraction has 1692 states and 4864 transitions. [2022-03-15 22:24:43,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5909090909090908) 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 22:24:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 4864 transitions. [2022-03-15 22:24:43,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:43,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:43,417 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:43,433 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 22:24:43,619 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,SelfDestructingSolverStorable245 [2022-03-15 22:24:43,619 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:43,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:43,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1684151686, now seen corresponding path program 245 times [2022-03-15 22:24:43,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:43,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119434781] [2022-03-15 22:24:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:43,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:43,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:43,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119434781] [2022-03-15 22:24:43,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119434781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:43,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5298972] [2022-03-15 22:24:43,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:24:43,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:43,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:43,840 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 22:24:43,841 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 22:24:43,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 22:24:43,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:43,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 22:24:43,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:24:44,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:45,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5298972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:45,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:45,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 39 [2022-03-15 22:24:45,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2106877501] [2022-03-15 22:24:45,707 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:45,708 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:45,710 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:24:45,710 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:45,903 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [580681#(< j1 M1), 580680#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= (* 2 C) counter)) (or (not (< j1 M1)) (<= 2 j1)) (or (<= counter (* 2 C)) (not (< j1 M1))) (or (not (< j1 M1)) (= M2 M1))), 580683#(and (or (not (< (+ j1 1) M1)) (<= 1 j1)) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (not (< (+ j1 1) M1)) (<= counter C)) (or (<= C counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1)))), 580684#(and (or (<= j2 0) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 0 j1)) (or (not (< (+ 2 j1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 580682#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:24:45,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:24:45,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:24:45,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1612, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:24:45,904 INFO L87 Difference]: Start difference. First operand 1692 states and 4864 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 22:24:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:46,687 INFO L93 Difference]: Finished difference Result 2116 states and 5794 transitions. [2022-03-15 22:24:46,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:24:46,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:46,691 INFO L225 Difference]: With dead ends: 2116 [2022-03-15 22:24:46,691 INFO L226 Difference]: Without dead ends: 2112 [2022-03-15 22:24:46,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=831, Invalid=3201, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 22:24:46,691 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:46,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:24:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-03-15 22:24:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1691. [2022-03-15 22:24:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 2.876923076923077) internal successors, (4862), 1690 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 4862 transitions. [2022-03-15 22:24:46,716 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 4862 transitions. Word has length 20 [2022-03-15 22:24:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:46,716 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 4862 transitions. [2022-03-15 22:24:46,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 22:24:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 4862 transitions. [2022-03-15 22:24:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:46,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:46,718 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:46,734 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 22:24:46,935 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,SelfDestructingSolverStorable246 [2022-03-15 22:24:46,935 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash -371949022, now seen corresponding path program 246 times [2022-03-15 22:24:46,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:46,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007541065] [2022-03-15 22:24:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:47,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:47,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007541065] [2022-03-15 22:24:47,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007541065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:47,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925214716] [2022-03-15 22:24:47,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:24:47,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:47,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:47,145 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 22:24:47,145 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 22:24:47,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:24:47,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:24:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:47,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:24:47,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925214716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:47,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:47,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 35 [2022-03-15 22:24:47,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [676368414] [2022-03-15 22:24:47,734 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:47,734 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:47,737 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 52 transitions. [2022-03-15 22:24:47,738 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:48,379 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [586376#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 586378#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2)))), 586372#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 586371#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 586373#(< j1 M1), 586374#(or (< j1 M1) (<= (+ j2 1) M2)), 586377#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 586375#(or (< j1 M1) (<= (+ 2 j2) M2)), 586379#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ 3 j2))) (or (<= counter 0) (< j1 M1) (<= (+ (* 2 C) 1) counter)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2)))] [2022-03-15 22:24:48,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 22:24:48,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 22:24:48,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:24:48,380 INFO L87 Difference]: Start difference. First operand 1691 states and 4862 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:49,266 INFO L93 Difference]: Finished difference Result 1832 states and 5177 transitions. [2022-03-15 22:24:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 22:24:49,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:49,268 INFO L225 Difference]: With dead ends: 1832 [2022-03-15 22:24:49,268 INFO L226 Difference]: Without dead ends: 1832 [2022-03-15 22:24:49,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=436, Invalid=3724, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:24:49,269 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:49,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:24:49,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2022-03-15 22:24:49,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1694. [2022-03-15 22:24:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 2.8777318369757827) internal successors, (4872), 1693 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 4872 transitions. [2022-03-15 22:24:49,288 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 4872 transitions. Word has length 20 [2022-03-15 22:24:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:49,288 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 4872 transitions. [2022-03-15 22:24:49,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 4872 transitions. [2022-03-15 22:24:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:49,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:49,289 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:49,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:49,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:49,505 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 921281847, now seen corresponding path program 247 times [2022-03-15 22:24:49,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:49,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171496435] [2022-03-15 22:24:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:49,870 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 22:24:49,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:49,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171496435] [2022-03-15 22:24:49,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171496435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:49,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016577237] [2022-03-15 22:24:49,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:24:49,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:49,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:49,871 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:24:49,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-15 22:24:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:24:49,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:50,479 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 22:24:50,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:24:50,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016577237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:50,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:50,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 36 [2022-03-15 22:24:50,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1684380154] [2022-03-15 22:24:50,902 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:50,903 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:50,906 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 48 transitions. [2022-03-15 22:24:50,906 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:51,849 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [591792#(or (< j1 M1) (= counter 0)), 591793#(or (< j2 M2) (< j1 M1) (= counter 0)), 591794#(and (or (= (+ C (* (- 1) counter)) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 591796#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (<= counter (* 2 C)) (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 3 j2) M2) (<= (* 2 C) counter))), 591799#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 591798#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* C 4) counter)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= counter (* C 4))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= (+ (* 3 C) 1) counter))), 591795#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 591797#(and (or (< j1 M1) (<= counter (* 3 C)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 3 C) counter) (<= (+ j2 4) M2)))] [2022-03-15 22:24:51,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 22:24:51,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 22:24:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:24:51,850 INFO L87 Difference]: Start difference. First operand 1694 states and 4872 transitions. Second operand has 25 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:57,190 INFO L93 Difference]: Finished difference Result 2221 states and 5979 transitions. [2022-03-15 22:24:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 22:24:57,190 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:24:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:57,193 INFO L225 Difference]: With dead ends: 2221 [2022-03-15 22:24:57,193 INFO L226 Difference]: Without dead ends: 2214 [2022-03-15 22:24:57,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1532, Invalid=12274, Unknown=0, NotChecked=0, Total=13806 [2022-03-15 22:24:57,194 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 176 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:57,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 0 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 22:24:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2022-03-15 22:24:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1718. [2022-03-15 22:24:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 2.8788584740827026) internal successors, (4943), 1717 states have internal predecessors, (4943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 4943 transitions. [2022-03-15 22:24:57,215 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 4943 transitions. Word has length 20 [2022-03-15 22:24:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:57,215 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 4943 transitions. [2022-03-15 22:24:57,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 4943 transitions. [2022-03-15 22:24:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:57,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:57,217 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:57,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:57,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:57,433 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:57,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1139490111, now seen corresponding path program 248 times [2022-03-15 22:24:57,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:57,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171129369] [2022-03-15 22:24:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:57,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:57,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:57,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171129369] [2022-03-15 22:24:57,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171129369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:57,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074939127] [2022-03-15 22:24:57,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:24:57,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:57,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:57,641 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:24:57,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-15 22:24:57,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:24:57,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:57,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 22:24:57,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:24:57,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:24:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:24:58,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074939127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:24:58,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:24:58,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 30 [2022-03-15 22:24:58,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [855593615] [2022-03-15 22:24:58,232 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:24:58,233 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:24:58,235 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:24:58,235 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:24:58,370 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [597666#(< j2 M2), 597747#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 597746#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:24:58,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:24:58,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:24:58,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:24:58,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:24:58,370 INFO L87 Difference]: Start difference. First operand 1718 states and 4943 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 22:24:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:24:58,880 INFO L93 Difference]: Finished difference Result 2290 states and 6421 transitions. [2022-03-15 22:24:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:24:58,880 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 20 [2022-03-15 22:24:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:24:58,884 INFO L225 Difference]: With dead ends: 2290 [2022-03-15 22:24:58,884 INFO L226 Difference]: Without dead ends: 2289 [2022-03-15 22:24:58,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:24:58,885 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:24:58,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:24:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2022-03-15 22:24:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1747. [2022-03-15 22:24:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 2.8808705612829324) internal successors, (5030), 1746 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:24:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 5030 transitions. [2022-03-15 22:24:58,912 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 5030 transitions. Word has length 20 [2022-03-15 22:24:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:24:58,912 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 5030 transitions. [2022-03-15 22:24:58,912 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 22:24:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 5030 transitions. [2022-03-15 22:24:58,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:24:58,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:24:58,914 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:24:58,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-03-15 22:24:59,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-15 22:24:59,131 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:24:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:24:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1339483465, now seen corresponding path program 249 times [2022-03-15 22:24:59,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:24:59,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436025738] [2022-03-15 22:24:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:24:59,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:24:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:24:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:24:59,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:24:59,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436025738] [2022-03-15 22:24:59,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436025738] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:24:59,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589452899] [2022-03-15 22:24:59,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:24:59,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:24:59,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:24:59,273 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:24:59,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-15 22:24:59,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:24:59,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:24:59,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 22:24:59,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:24:59,907 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 22:24:59,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:01,125 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 22:25:01,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589452899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:01,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:01,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 37 [2022-03-15 22:25:01,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [353124479] [2022-03-15 22:25:01,126 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:01,126 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:01,129 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:01,129 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:01,292 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [603716#(< j1 M1), 603719#(or (< j1 M1) (<= (+ j2 1) M2)), 603717#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 603718#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:25:01,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:25:01,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:01,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:25:01,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1382, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:25:01,293 INFO L87 Difference]: Start difference. First operand 1747 states and 5030 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 22:25:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:02,374 INFO L93 Difference]: Finished difference Result 3464 states and 9640 transitions. [2022-03-15 22:25:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 22:25:02,374 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 20 [2022-03-15 22:25:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:02,378 INFO L225 Difference]: With dead ends: 3464 [2022-03-15 22:25:02,378 INFO L226 Difference]: Without dead ends: 3456 [2022-03-15 22:25:02,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1192, Invalid=3920, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 22:25:02,379 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:02,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:25:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2022-03-15 22:25:02,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 2654. [2022-03-15 22:25:02,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 2.9246136449302678) internal successors, (7759), 2653 states have internal predecessors, (7759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 7759 transitions. [2022-03-15 22:25:02,411 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 7759 transitions. Word has length 20 [2022-03-15 22:25:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:02,411 INFO L470 AbstractCegarLoop]: Abstraction has 2654 states and 7759 transitions. [2022-03-15 22:25:02,412 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 22:25:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 7759 transitions. [2022-03-15 22:25:02,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:02,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:02,414 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:02,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:02,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:02,629 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:02,629 INFO L85 PathProgramCache]: Analyzing trace with hash 403326870, now seen corresponding path program 250 times [2022-03-15 22:25:02,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:02,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175528160] [2022-03-15 22:25:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:02,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:03,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:03,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175528160] [2022-03-15 22:25:03,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175528160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:03,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520770940] [2022-03-15 22:25:03,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:25:03,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:03,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:03,079 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:03,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-15 22:25:03,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:25:03,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:25:03,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:04,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520770940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:04,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:04,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:25:04,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [79889580] [2022-03-15 22:25:04,785 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:04,786 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:04,788 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:04,788 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:05,024 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [612706#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= 1 j1)) (or (not (< j1 M1)) (<= C counter))), 612707#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 0 j1)) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 612704#(or (< j1 M1) (= counter 0)), 612705#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:25:05,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:25:05,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:05,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:25:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:25:05,024 INFO L87 Difference]: Start difference. First operand 2654 states and 7759 transitions. Second operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:06,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:06,390 INFO L93 Difference]: Finished difference Result 2763 states and 7952 transitions. [2022-03-15 22:25:06,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 22:25:06,390 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:06,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:06,394 INFO L225 Difference]: With dead ends: 2763 [2022-03-15 22:25:06,394 INFO L226 Difference]: Without dead ends: 2750 [2022-03-15 22:25:06,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=536, Invalid=3370, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 22:25:06,394 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:06,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:25:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2022-03-15 22:25:06,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2676. [2022-03-15 22:25:06,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 2.9170093457943924) internal successors, (7803), 2675 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 7803 transitions. [2022-03-15 22:25:06,425 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 7803 transitions. Word has length 20 [2022-03-15 22:25:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:06,425 INFO L470 AbstractCegarLoop]: Abstraction has 2676 states and 7803 transitions. [2022-03-15 22:25:06,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 7803 transitions. [2022-03-15 22:25:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:06,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:06,427 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:06,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-03-15 22:25:06,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:06,643 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:06,643 INFO L85 PathProgramCache]: Analyzing trace with hash 164064887, now seen corresponding path program 251 times [2022-03-15 22:25:06,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:06,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265574591] [2022-03-15 22:25:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:06,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:25:06,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:06,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265574591] [2022-03-15 22:25:06,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265574591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:06,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435365522] [2022-03-15 22:25:06,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:25:06,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:06,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:06,837 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:06,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-15 22:25:06,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:25:06,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:06,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 22:25:06,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:07,748 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 22:25:07,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:08,921 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 22:25:08,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435365522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:08,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:08,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 39 [2022-03-15 22:25:08,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [159629176] [2022-03-15 22:25:08,922 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:08,923 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:08,925 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:08,925 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:09,071 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [621022#(or (< j1 M1) (<= (+ j2 1) M2)), 621021#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 621019#(< j1 M1), 621020#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:25:09,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:25:09,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:25:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1530, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:25:09,071 INFO L87 Difference]: Start difference. First operand 2676 states and 7803 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 22:25:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:09,739 INFO L93 Difference]: Finished difference Result 3094 states and 8716 transitions. [2022-03-15 22:25:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:25:09,739 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 20 [2022-03-15 22:25:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:09,744 INFO L225 Difference]: With dead ends: 3094 [2022-03-15 22:25:09,744 INFO L226 Difference]: Without dead ends: 3088 [2022-03-15 22:25:09,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=824, Invalid=3082, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 22:25:09,744 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:09,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:09,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2022-03-15 22:25:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2654. [2022-03-15 22:25:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 2.9114210327930645) internal successors, (7724), 2653 states have internal predecessors, (7724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 7724 transitions. [2022-03-15 22:25:09,791 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 7724 transitions. Word has length 20 [2022-03-15 22:25:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:09,791 INFO L470 AbstractCegarLoop]: Abstraction has 2654 states and 7724 transitions. [2022-03-15 22:25:09,791 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 22:25:09,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 7724 transitions. [2022-03-15 22:25:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:09,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:09,793 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:09,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:09,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:09,995 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:09,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1906875222, now seen corresponding path program 252 times [2022-03-15 22:25:09,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:09,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545478938] [2022-03-15 22:25:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:09,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:10,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:10,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545478938] [2022-03-15 22:25:10,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545478938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:10,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962361735] [2022-03-15 22:25:10,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:25:10,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:10,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:10,315 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:10,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-15 22:25:10,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:25:10,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:10,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:10,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:25:10,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:11,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962361735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:11,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:11,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 35 [2022-03-15 22:25:11,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1196378242] [2022-03-15 22:25:11,765 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:11,766 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:11,768 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:11,768 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:11,921 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [629617#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1)))), 629615#(or (< j2 M2) (< j1 M1) (= counter 0)), 629616#(and (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (= M2 M1)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 629614#(or (< j1 M1) (= counter 0))] [2022-03-15 22:25:11,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:25:11,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:11,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:25:11,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:25:11,921 INFO L87 Difference]: Start difference. First operand 2654 states and 7724 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:25:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:13,157 INFO L93 Difference]: Finished difference Result 2831 states and 8065 transitions. [2022-03-15 22:25:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 22:25:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:25:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:13,161 INFO L225 Difference]: With dead ends: 2831 [2022-03-15 22:25:13,161 INFO L226 Difference]: Without dead ends: 2819 [2022-03-15 22:25:13,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=536, Invalid=4020, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 22:25:13,162 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:13,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:25:13,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2022-03-15 22:25:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2655. [2022-03-15 22:25:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 2.9110776186887715) internal successors, (7726), 2654 states have internal predecessors, (7726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 7726 transitions. [2022-03-15 22:25:13,199 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 7726 transitions. Word has length 20 [2022-03-15 22:25:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:13,199 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 7726 transitions. [2022-03-15 22:25:13,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:25:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 7726 transitions. [2022-03-15 22:25:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:13,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:13,202 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:13,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:13,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:13,415 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:13,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:13,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1539683453, now seen corresponding path program 253 times [2022-03-15 22:25:13,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:13,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799401126] [2022-03-15 22:25:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:13,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:13,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:13,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799401126] [2022-03-15 22:25:13,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799401126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:13,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363936642] [2022-03-15 22:25:13,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:25:13,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:13,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:13,566 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:13,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-15 22:25:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:13,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 22:25:13,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:14,305 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 22:25:14,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:15,057 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 22:25:15,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363936642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:15,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:15,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 41 [2022-03-15 22:25:15,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [834444576] [2022-03-15 22:25:15,057 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:15,058 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:15,060 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 22:25:15,060 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:15,244 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [637972#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 0 j1)) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1)))), 637970#(or (< j1 M1) (<= (+ j2 1) M2)), 637971#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (= M2 M1)) (or (not (< j1 M1)) (<= 1 j1)) (or (not (< j1 M1)) (<= C counter))), 637969#(< j1 M1), 637973#(or (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:25:15,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:25:15,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:25:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:25:15,245 INFO L87 Difference]: Start difference. First operand 2655 states and 7726 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 22:25:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:15,882 INFO L93 Difference]: Finished difference Result 3884 states and 11145 transitions. [2022-03-15 22:25:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:25:15,883 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 20 [2022-03-15 22:25:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:15,888 INFO L225 Difference]: With dead ends: 3884 [2022-03-15 22:25:15,888 INFO L226 Difference]: Without dead ends: 3884 [2022-03-15 22:25:15,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=860, Invalid=3430, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 22:25:15,888 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:15,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2022-03-15 22:25:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 2715. [2022-03-15 22:25:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 2.916728076639646) internal successors, (7916), 2714 states have internal predecessors, (7916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 7916 transitions. [2022-03-15 22:25:15,927 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 7916 transitions. Word has length 20 [2022-03-15 22:25:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:15,927 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 7916 transitions. [2022-03-15 22:25:15,927 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 22:25:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 7916 transitions. [2022-03-15 22:25:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:15,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:15,929 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:15,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-03-15 22:25:16,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-15 22:25:16,146 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash 306437368, now seen corresponding path program 254 times [2022-03-15 22:25:16,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:16,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710813438] [2022-03-15 22:25:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:16,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:16,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:16,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710813438] [2022-03-15 22:25:16,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710813438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:16,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40130327] [2022-03-15 22:25:16,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:25:16,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:16,340 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:16,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-15 22:25:16,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:25:16,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:16,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:16,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:17,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40130327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:17,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:17,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:25:17,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [839720919] [2022-03-15 22:25:17,468 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:17,469 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:17,472 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:17,472 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:17,620 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [647479#(or (< j2 M2) (< j1 M1) (= counter 0)), 647481#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 647478#(or (< j1 M1) (= counter 0)), 647480#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:25:17,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:25:17,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:17,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:25:17,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1471, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:25:17,632 INFO L87 Difference]: Start difference. First operand 2715 states and 7916 transitions. Second operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:18,687 INFO L93 Difference]: Finished difference Result 2959 states and 8389 transitions. [2022-03-15 22:25:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 22:25:18,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:18,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:18,699 INFO L225 Difference]: With dead ends: 2959 [2022-03-15 22:25:18,699 INFO L226 Difference]: Without dead ends: 2947 [2022-03-15 22:25:18,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=551, Invalid=3739, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 22:25:18,701 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:18,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:25:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2022-03-15 22:25:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2715. [2022-03-15 22:25:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 2.916728076639646) internal successors, (7916), 2714 states have internal predecessors, (7916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 7916 transitions. [2022-03-15 22:25:18,746 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 7916 transitions. Word has length 20 [2022-03-15 22:25:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:18,747 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 7916 transitions. [2022-03-15 22:25:18,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:18,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 7916 transitions. [2022-03-15 22:25:18,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:18,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:18,749 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:18,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:18,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-03-15 22:25:18,968 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1736196958, now seen corresponding path program 255 times [2022-03-15 22:25:18,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:18,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780993240] [2022-03-15 22:25:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:18,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:19,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:19,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780993240] [2022-03-15 22:25:19,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780993240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:19,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218629715] [2022-03-15 22:25:19,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:25:19,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:19,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:19,273 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:19,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-15 22:25:19,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:25:19,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:19,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:19,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:25:19,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:20,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218629715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:20,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:20,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:25:20,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1791614732] [2022-03-15 22:25:20,527 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:20,528 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:20,530 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 22:25:20,530 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:20,821 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [656073#(and (or (< 0 C) (< j1 M1) (<= (+ 2 j2) M2)) (or (= C counter) (< j1 M1) (<= (+ 2 j2) M2))), 656074#(and (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (= M2 M1)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 656071#(or (< j1 M1) (= counter 0)), 656072#(or (< j2 M2) (< j1 M1) (= counter 0)), 656075#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))))] [2022-03-15 22:25:20,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:25:20,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:20,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:25:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1544, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:25:20,822 INFO L87 Difference]: Start difference. First operand 2715 states and 7916 transitions. Second operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22:25:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:22,346 INFO L93 Difference]: Finished difference Result 3719 states and 10520 transitions. [2022-03-15 22:25:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:25:22,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:25:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:22,352 INFO L225 Difference]: With dead ends: 3719 [2022-03-15 22:25:22,352 INFO L226 Difference]: Without dead ends: 3689 [2022-03-15 22:25:22,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=746, Invalid=4224, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 22:25:22,352 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:22,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:25:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3689 states. [2022-03-15 22:25:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3689 to 2785. [2022-03-15 22:25:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 2.9177442528735633) internal successors, (8123), 2784 states have internal predecessors, (8123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 8123 transitions. [2022-03-15 22:25:22,398 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 8123 transitions. Word has length 20 [2022-03-15 22:25:22,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:22,398 INFO L470 AbstractCegarLoop]: Abstraction has 2785 states and 8123 transitions. [2022-03-15 22:25:22,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22:25:22,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 8123 transitions. [2022-03-15 22:25:22,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:22,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:22,401 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:22,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-03-15 22:25:22,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-03-15 22:25:22,611 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:22,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1632886472, now seen corresponding path program 256 times [2022-03-15 22:25:22,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:22,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311657251] [2022-03-15 22:25:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:22,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:22,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:22,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311657251] [2022-03-15 22:25:22,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311657251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:22,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060704462] [2022-03-15 22:25:22,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:25:22,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:22,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:22,849 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:22,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-15 22:25:22,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:25:22,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:22,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:25:22,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:25:23,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:24,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060704462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:24,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:24,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 37 [2022-03-15 22:25:24,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [915178867] [2022-03-15 22:25:24,516 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:24,517 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:24,519 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:24,519 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:24,659 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [665573#(< j1 M1), 665576#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 665575#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 665574#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:25:24,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:25:24,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:25:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:25:24,660 INFO L87 Difference]: Start difference. First operand 2785 states and 8123 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 22:25:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:25,368 INFO L93 Difference]: Finished difference Result 3445 states and 9823 transitions. [2022-03-15 22:25:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:25:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 22:25:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:25,373 INFO L225 Difference]: With dead ends: 3445 [2022-03-15 22:25:25,373 INFO L226 Difference]: Without dead ends: 3441 [2022-03-15 22:25:25,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:25:25,373 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:25,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:25:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2022-03-15 22:25:25,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 2786. [2022-03-15 22:25:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2785 states have (on average 2.9174147217235187) internal successors, (8125), 2785 states have internal predecessors, (8125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 8125 transitions. [2022-03-15 22:25:25,408 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 8125 transitions. Word has length 20 [2022-03-15 22:25:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:25,408 INFO L470 AbstractCegarLoop]: Abstraction has 2786 states and 8125 transitions. [2022-03-15 22:25:25,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 22:25:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 8125 transitions. [2022-03-15 22:25:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:25,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:25,411 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:25,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:25,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:25,626 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:25,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash -767640512, now seen corresponding path program 257 times [2022-03-15 22:25:25,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:25,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583924609] [2022-03-15 22:25:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:25,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:25,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:25,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583924609] [2022-03-15 22:25:25,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583924609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:25,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436516663] [2022-03-15 22:25:25,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:25:25,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:25,851 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:25,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-15 22:25:25,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 22:25:25,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:25,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 22:25:25,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:25:26,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:27,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436516663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:27,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:27,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 14] total 35 [2022-03-15 22:25:27,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [248078058] [2022-03-15 22:25:27,704 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:27,705 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:27,707 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:25:27,707 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:27,868 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [674782#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 674780#(< j2 M2), 674781#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter)))] [2022-03-15 22:25:27,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:25:27,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:27,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:25:27,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:25:27,869 INFO L87 Difference]: Start difference. First operand 2786 states and 8125 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:25:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:28,256 INFO L93 Difference]: Finished difference Result 3390 states and 9774 transitions. [2022-03-15 22:25:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:25:28,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:25:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:28,261 INFO L225 Difference]: With dead ends: 3390 [2022-03-15 22:25:28,261 INFO L226 Difference]: Without dead ends: 3389 [2022-03-15 22:25:28,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=574, Invalid=1976, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:25:28,261 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:28,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3389 states. [2022-03-15 22:25:28,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3389 to 2788. [2022-03-15 22:25:28,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.916038751345533) internal successors, (8127), 2787 states have internal predecessors, (8127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 8127 transitions. [2022-03-15 22:25:28,296 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 8127 transitions. Word has length 20 [2022-03-15 22:25:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:28,296 INFO L470 AbstractCegarLoop]: Abstraction has 2788 states and 8127 transitions. [2022-03-15 22:25:28,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:25:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 8127 transitions. [2022-03-15 22:25:28,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:28,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:28,299 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:28,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:28,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:28,514 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1482222303, now seen corresponding path program 258 times [2022-03-15 22:25:28,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:28,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247622523] [2022-03-15 22:25:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:28,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:28,708 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 22:25:28,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:28,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247622523] [2022-03-15 22:25:28,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247622523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:28,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427506887] [2022-03-15 22:25:28,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:25:28,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:28,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:28,710 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:28,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-15 22:25:28,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:25:28,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:28,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:29,085 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 22:25:29,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:29,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427506887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:29,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:29,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2022-03-15 22:25:29,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1840416812] [2022-03-15 22:25:29,496 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:29,496 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:29,499 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 44 transitions. [2022-03-15 22:25:29,499 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:29,918 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [683928#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 683926#(or (< j1 M1) (= counter 0)), 683932#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 683929#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2))), 683931#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 683927#(or (< j2 M2) (< j1 M1) (= counter 0)), 683930#(and (or (< j1 M1) (= (* 3 C) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ 2 C) counter) (<= (+ j2 4) M2)))] [2022-03-15 22:25:29,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:25:29,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:29,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:25:29,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:25:29,918 INFO L87 Difference]: Start difference. First operand 2788 states and 8127 transitions. Second operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:33,616 INFO L93 Difference]: Finished difference Result 3266 states and 9101 transitions. [2022-03-15 22:25:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 22:25:33,616 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:25:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:33,620 INFO L225 Difference]: With dead ends: 3266 [2022-03-15 22:25:33,620 INFO L226 Difference]: Without dead ends: 3238 [2022-03-15 22:25:33,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1142, Invalid=8758, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 22:25:33,621 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 140 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:33,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 0 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:25:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2022-03-15 22:25:33,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 2800. [2022-03-15 22:25:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 2.90853876384423) internal successors, (8141), 2799 states have internal predecessors, (8141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 8141 transitions. [2022-03-15 22:25:33,665 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 8141 transitions. Word has length 20 [2022-03-15 22:25:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:33,665 INFO L470 AbstractCegarLoop]: Abstraction has 2800 states and 8141 transitions. [2022-03-15 22:25:33,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 8141 transitions. [2022-03-15 22:25:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:33,668 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:33,668 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:33,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:33,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-03-15 22:25:33,877 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:33,877 INFO L85 PathProgramCache]: Analyzing trace with hash -231314474, now seen corresponding path program 259 times [2022-03-15 22:25:33,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:33,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958378780] [2022-03-15 22:25:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:33,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:34,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:34,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958378780] [2022-03-15 22:25:34,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958378780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:34,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856027878] [2022-03-15 22:25:34,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:25:34,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:34,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:34,079 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:34,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-15 22:25:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:34,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:25:34,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:35,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856027878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:35,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:35,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:25:35,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1052250756] [2022-03-15 22:25:35,298 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:35,298 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:35,301 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:35,301 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:35,490 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [693062#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 693060#(or (< j2 M2) (< j1 M1) (= counter 0)), 693061#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 693059#(or (< j1 M1) (= counter 0))] [2022-03-15 22:25:35,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:25:35,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:35,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:25:35,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:25:35,491 INFO L87 Difference]: Start difference. First operand 2800 states and 8141 transitions. Second operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:36,289 INFO L93 Difference]: Finished difference Result 2888 states and 8289 transitions. [2022-03-15 22:25:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:25:36,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:36,294 INFO L225 Difference]: With dead ends: 2888 [2022-03-15 22:25:36,294 INFO L226 Difference]: Without dead ends: 2876 [2022-03-15 22:25:36,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=467, Invalid=2839, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 22:25:36,295 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:36,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:25:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2022-03-15 22:25:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2807. [2022-03-15 22:25:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 2.906272273699216) internal successors, (8155), 2806 states have internal predecessors, (8155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 8155 transitions. [2022-03-15 22:25:36,335 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 8155 transitions. Word has length 20 [2022-03-15 22:25:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:36,335 INFO L470 AbstractCegarLoop]: Abstraction has 2807 states and 8155 transitions. [2022-03-15 22:25:36,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 8155 transitions. [2022-03-15 22:25:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:36,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:36,338 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:36,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-03-15 22:25:36,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:36,556 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1694719604, now seen corresponding path program 260 times [2022-03-15 22:25:36,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:36,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510009267] [2022-03-15 22:25:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:36,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:36,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:36,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510009267] [2022-03-15 22:25:36,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510009267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:36,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989534094] [2022-03-15 22:25:36,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:25:36,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:36,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:36,823 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:36,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-15 22:25:36,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:25:36,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:36,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:36,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:25:37,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:38,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989534094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:38,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:38,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:25:38,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [817199705] [2022-03-15 22:25:38,210 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:38,211 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:38,213 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:38,213 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:38,432 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [701750#(or (< j2 M2) (< j1 M1) (= counter 0)), 701751#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 701752#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 701749#(or (< j1 M1) (= counter 0))] [2022-03-15 22:25:38,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:25:38,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:38,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:25:38,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:25:38,433 INFO L87 Difference]: Start difference. First operand 2807 states and 8155 transitions. Second operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:39,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:39,884 INFO L93 Difference]: Finished difference Result 2941 states and 8389 transitions. [2022-03-15 22:25:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:25:39,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:39,888 INFO L225 Difference]: With dead ends: 2941 [2022-03-15 22:25:39,888 INFO L226 Difference]: Without dead ends: 2928 [2022-03-15 22:25:39,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=582, Invalid=3974, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 22:25:39,889 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:39,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:25:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2022-03-15 22:25:39,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 2808. [2022-03-15 22:25:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2807 states have (on average 2.9059494121838263) internal successors, (8157), 2807 states have internal predecessors, (8157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 8157 transitions. [2022-03-15 22:25:39,923 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 8157 transitions. Word has length 20 [2022-03-15 22:25:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:39,924 INFO L470 AbstractCegarLoop]: Abstraction has 2808 states and 8157 transitions. [2022-03-15 22:25:39,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 8157 transitions. [2022-03-15 22:25:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:39,926 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:39,926 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:39,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-03-15 22:25:40,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:40,142 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1751839071, now seen corresponding path program 261 times [2022-03-15 22:25:40,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:40,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840155730] [2022-03-15 22:25:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:40,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:25:40,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:40,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840155730] [2022-03-15 22:25:40,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840155730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:40,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186268931] [2022-03-15 22:25:40,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:25:40,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:40,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:40,323 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:40,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-15 22:25:40,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:25:40,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:40,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:25:40,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:41,753 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 22:25:41,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:42,577 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 22:25:42,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186268931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:42,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:42,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 38 [2022-03-15 22:25:42,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [704427247] [2022-03-15 22:25:42,578 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:42,578 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:42,581 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 22:25:42,581 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:42,784 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [710517#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 710518#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 710515#(< j1 M1), 710519#(or (< j1 M1) (<= (+ 2 j2) M2)), 710516#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:25:42,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:25:42,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:42,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:25:42,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1553, Unknown=1, NotChecked=0, Total=1892 [2022-03-15 22:25:42,785 INFO L87 Difference]: Start difference. First operand 2808 states and 8157 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 22:25:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:43,325 INFO L93 Difference]: Finished difference Result 3380 states and 9582 transitions. [2022-03-15 22:25:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:25:43,325 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 20 [2022-03-15 22:25:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:43,329 INFO L225 Difference]: With dead ends: 3380 [2022-03-15 22:25:43,329 INFO L226 Difference]: Without dead ends: 3380 [2022-03-15 22:25:43,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=738, Invalid=3043, Unknown=1, NotChecked=0, Total=3782 [2022-03-15 22:25:43,330 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:43,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3380 states. [2022-03-15 22:25:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3380 to 2823. [2022-03-15 22:25:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 2.907512402551382) internal successors, (8205), 2822 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8205 transitions. [2022-03-15 22:25:43,363 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8205 transitions. Word has length 20 [2022-03-15 22:25:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:43,363 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 8205 transitions. [2022-03-15 22:25:43,363 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 22:25:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8205 transitions. [2022-03-15 22:25:43,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:43,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:43,366 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:43,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:43,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:43,580 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:43,581 INFO L85 PathProgramCache]: Analyzing trace with hash 94281750, now seen corresponding path program 262 times [2022-03-15 22:25:43,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:43,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860761353] [2022-03-15 22:25:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:43,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:43,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:43,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860761353] [2022-03-15 22:25:43,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860761353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:43,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646271878] [2022-03-15 22:25:43,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:25:43,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:43,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:43,911 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:43,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-15 22:25:43,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:25:43,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:43,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:44,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:44,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646271878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:44,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:44,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:25:44,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2074543258] [2022-03-15 22:25:44,989 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:44,990 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:44,992 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:44,992 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:45,140 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [719736#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 719734#(or (< j1 M1) (= counter 0)), 719735#(or (< j2 M2) (< j1 M1) (= counter 0)), 719737#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:25:45,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:25:45,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:45,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:25:45,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:25:45,140 INFO L87 Difference]: Start difference. First operand 2823 states and 8205 transitions. Second operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:46,109 INFO L93 Difference]: Finished difference Result 3002 states and 8541 transitions. [2022-03-15 22:25:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 22:25:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:46,113 INFO L225 Difference]: With dead ends: 3002 [2022-03-15 22:25:46,113 INFO L226 Difference]: Without dead ends: 2989 [2022-03-15 22:25:46,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=570, Invalid=3720, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 22:25:46,114 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:46,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:25:46,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-03-15 22:25:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2825. [2022-03-15 22:25:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 2.906869688385269) internal successors, (8209), 2824 states have internal predecessors, (8209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 8209 transitions. [2022-03-15 22:25:46,144 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 8209 transitions. Word has length 20 [2022-03-15 22:25:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:46,144 INFO L470 AbstractCegarLoop]: Abstraction has 2825 states and 8209 transitions. [2022-03-15 22:25:46,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 8209 transitions. [2022-03-15 22:25:46,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:46,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:46,147 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:46,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:46,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:46,362 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:46,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1948352576, now seen corresponding path program 263 times [2022-03-15 22:25:46,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:46,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708739376] [2022-03-15 22:25:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:46,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:46,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:46,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708739376] [2022-03-15 22:25:46,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708739376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:46,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273147217] [2022-03-15 22:25:46,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:25:46,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:46,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:46,680 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:46,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-15 22:25:46,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:25:46,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:46,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:25:47,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:47,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273147217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:47,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:47,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:25:47,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1266080895] [2022-03-15 22:25:47,807 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:47,808 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:47,810 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 22:25:47,810 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:48,031 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [728593#(and (or (not (< j1 M1)) (<= j1 (+ j2 1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 728591#(or (< j2 M2) (< j1 M1) (= counter 0)), 728594#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (<= j1 j2) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 728590#(or (< j1 M1) (= counter 0)), 728592#(or (= (+ (* (- 1) C) counter) 0) (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:25:48,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:25:48,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:48,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:25:48,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:25:48,032 INFO L87 Difference]: Start difference. First operand 2825 states and 8209 transitions. Second operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22:25:49,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:49,376 INFO L93 Difference]: Finished difference Result 2934 states and 8391 transitions. [2022-03-15 22:25:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 22:25:49,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:25:49,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:49,380 INFO L225 Difference]: With dead ends: 2934 [2022-03-15 22:25:49,380 INFO L226 Difference]: Without dead ends: 2919 [2022-03-15 22:25:49,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=783, Invalid=4917, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 22:25:49,381 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:49,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:25:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2022-03-15 22:25:49,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2829. [2022-03-15 22:25:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 2.9055869872701554) internal successors, (8217), 2828 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 8217 transitions. [2022-03-15 22:25:49,412 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 8217 transitions. Word has length 20 [2022-03-15 22:25:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:49,412 INFO L470 AbstractCegarLoop]: Abstraction has 2829 states and 8217 transitions. [2022-03-15 22:25:49,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22:25:49,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 8217 transitions. [2022-03-15 22:25:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:49,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:49,414 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:49,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:49,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:49,629 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:49,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1705222708, now seen corresponding path program 264 times [2022-03-15 22:25:49,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:49,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028747012] [2022-03-15 22:25:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:49,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:49,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:49,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028747012] [2022-03-15 22:25:49,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028747012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:49,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959978828] [2022-03-15 22:25:49,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:25:49,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:49,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:49,872 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:49,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-15 22:25:49,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:25:49,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:49,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:25:50,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:51,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959978828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:51,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:51,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:25:51,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1694930365] [2022-03-15 22:25:51,042 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:51,043 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:51,045 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:51,045 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:51,191 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [737407#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 737406#(or (< j2 M2) (< j1 M1) (= counter 0)), 737405#(or (< j1 M1) (= counter 0)), 737408#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:25:51,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:25:51,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:51,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:25:51,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:25:51,192 INFO L87 Difference]: Start difference. First operand 2829 states and 8217 transitions. Second operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:52,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:52,124 INFO L93 Difference]: Finished difference Result 3034 states and 8644 transitions. [2022-03-15 22:25:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 22:25:52,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:52,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:52,127 INFO L225 Difference]: With dead ends: 3034 [2022-03-15 22:25:52,127 INFO L226 Difference]: Without dead ends: 3021 [2022-03-15 22:25:52,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=581, Invalid=3579, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:25:52,128 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:52,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2022-03-15 22:25:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 2831. [2022-03-15 22:25:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 2.904946996466431) internal successors, (8221), 2830 states have internal predecessors, (8221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 8221 transitions. [2022-03-15 22:25:52,159 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 8221 transitions. Word has length 20 [2022-03-15 22:25:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:52,159 INFO L470 AbstractCegarLoop]: Abstraction has 2831 states and 8221 transitions. [2022-03-15 22:25:52,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:25:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 8221 transitions. [2022-03-15 22:25:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:52,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:52,183 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:52,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:52,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-03-15 22:25:52,399 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:52,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:52,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1845042090, now seen corresponding path program 265 times [2022-03-15 22:25:52,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:52,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784316935] [2022-03-15 22:25:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:52,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:52,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:52,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784316935] [2022-03-15 22:25:52,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784316935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:52,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815679898] [2022-03-15 22:25:52,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:25:52,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:52,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:52,573 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:52,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-15 22:25:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:52,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:25:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:25:53,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:54,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815679898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:54,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:54,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 37 [2022-03-15 22:25:54,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1519869129] [2022-03-15 22:25:54,151 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:54,152 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:54,154 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:54,154 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:54,301 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [746304#(or (< j1 M1) (<= (+ j2 1) M2)), 746305#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (= M2 M1)) (or (not (< j1 M1)) (<= 1 j1)) (or (not (< j1 M1)) (<= C counter))), 746303#(< j1 M1), 746306#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 0 j1)) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:25:54,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:25:54,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:54,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:25:54,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:25:54,302 INFO L87 Difference]: Start difference. First operand 2831 states and 8221 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 22:25:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:54,905 INFO L93 Difference]: Finished difference Result 3506 states and 9992 transitions. [2022-03-15 22:25:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:25:54,905 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 22:25:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:54,909 INFO L225 Difference]: With dead ends: 3506 [2022-03-15 22:25:54,910 INFO L226 Difference]: Without dead ends: 3502 [2022-03-15 22:25:54,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=699, Invalid=2723, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 22:25:54,910 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:54,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-03-15 22:25:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2837. [2022-03-15 22:25:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2836 states have (on average 2.9044428772919604) internal successors, (8237), 2836 states have internal predecessors, (8237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 8237 transitions. [2022-03-15 22:25:54,949 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 8237 transitions. Word has length 20 [2022-03-15 22:25:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:54,949 INFO L470 AbstractCegarLoop]: Abstraction has 2837 states and 8237 transitions. [2022-03-15 22:25:54,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 22:25:54,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 8237 transitions. [2022-03-15 22:25:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:54,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:54,951 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:54,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:55,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-03-15 22:25:55,167 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash 518455287, now seen corresponding path program 266 times [2022-03-15 22:25:55,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:55,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311023961] [2022-03-15 22:25:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:55,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:55,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:55,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311023961] [2022-03-15 22:25:55,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311023961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:55,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347328109] [2022-03-15 22:25:55,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:25:55,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:55,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:55,279 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:55,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-15 22:25:55,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:25:55,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:55,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 22:25:55,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:55,858 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 22:25:55,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:56,647 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 22:25:56,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347328109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:56,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:56,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 39 [2022-03-15 22:25:56,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [42722763] [2022-03-15 22:25:56,648 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:56,648 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:56,651 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:25:56,651 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:56,854 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [755677#(< j1 M1), 755678#(or (< j1 M1) (<= (+ j2 1) M2)), 755675#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 755680#(or (< j1 M1) (<= (+ 3 j2) M2)), 755679#(or (< j1 M1) (<= (+ 2 j2) M2)), 755676#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:25:56,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:25:56,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:56,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:25:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:25:56,855 INFO L87 Difference]: Start difference. First operand 2837 states and 8237 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 22:25:57,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:57,524 INFO L93 Difference]: Finished difference Result 3212 states and 9058 transitions. [2022-03-15 22:25:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:25:57,524 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 22:25:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:57,528 INFO L225 Difference]: With dead ends: 3212 [2022-03-15 22:25:57,528 INFO L226 Difference]: Without dead ends: 3212 [2022-03-15 22:25:57,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=914, Invalid=3778, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 22:25:57,528 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:57,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2022-03-15 22:25:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 2777. [2022-03-15 22:25:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 2.8969740634005765) internal successors, (8042), 2776 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 8042 transitions. [2022-03-15 22:25:57,560 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 8042 transitions. Word has length 20 [2022-03-15 22:25:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:57,560 INFO L470 AbstractCegarLoop]: Abstraction has 2777 states and 8042 transitions. [2022-03-15 22:25:57,560 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 22:25:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 8042 transitions. [2022-03-15 22:25:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:57,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:57,562 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:57,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:57,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-03-15 22:25:57,777 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1272233878, now seen corresponding path program 267 times [2022-03-15 22:25:57,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:57,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905479367] [2022-03-15 22:25:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:57,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:57,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:57,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905479367] [2022-03-15 22:25:57,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905479367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:57,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684500576] [2022-03-15 22:25:57,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:25:57,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:57,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:57,943 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:57,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-15 22:25:57,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 22:25:57,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:25:57,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:58,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:59,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684500576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:59,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:59,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 35 [2022-03-15 22:25:59,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1353495152] [2022-03-15 22:25:59,021 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:59,021 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:59,024 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:25:59,024 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:59,170 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [764646#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 764644#(or (< j1 M1) (= counter 0)), 764645#(or (< j2 M2) (< j1 M1) (= counter 0)), 764647#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:25:59,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:25:59,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:59,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:25:59,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:25:59,171 INFO L87 Difference]: Start difference. First operand 2777 states and 8042 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:26:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:00,896 INFO L93 Difference]: Finished difference Result 3134 states and 8716 transitions. [2022-03-15 22:26:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 22:26:00,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:26:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:00,917 INFO L225 Difference]: With dead ends: 3134 [2022-03-15 22:26:00,917 INFO L226 Difference]: Without dead ends: 3109 [2022-03-15 22:26:00,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=779, Invalid=5383, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 22:26:00,917 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:00,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:26:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-03-15 22:26:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2784. [2022-03-15 22:26:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2783 states have (on average 2.896514552641035) internal successors, (8061), 2783 states have internal predecessors, (8061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 8061 transitions. [2022-03-15 22:26:00,947 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 8061 transitions. Word has length 20 [2022-03-15 22:26:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:00,947 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 8061 transitions. [2022-03-15 22:26:00,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 22:26:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 8061 transitions. [2022-03-15 22:26:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:00,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:00,949 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:00,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:01,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-15 22:26:01,164 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1924128994, now seen corresponding path program 268 times [2022-03-15 22:26:01,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:01,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423359153] [2022-03-15 22:26:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:01,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:01,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423359153] [2022-03-15 22:26:01,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423359153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:01,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938718877] [2022-03-15 22:26:01,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:26:01,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:01,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:01,456 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:01,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:26:01,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:01,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-15 22:26:01,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:26:01,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:01,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:02,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938718877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:02,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:02,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 35 [2022-03-15 22:26:02,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1826053996] [2022-03-15 22:26:02,697 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:02,697 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:02,700 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 22:26:02,700 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:03,004 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [773581#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 773578#(or (< j2 M2) (< j1 M1) (= counter 0)), 773580#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 773577#(or (< j1 M1) (= counter 0)), 773579#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2)))] [2022-03-15 22:26:03,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:26:03,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:26:03,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:26:03,005 INFO L87 Difference]: Start difference. First operand 2784 states and 8061 transitions. Second operand has 21 states, 20 states have (on average 1.65) 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 22:26:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:04,945 INFO L93 Difference]: Finished difference Result 3172 states and 8843 transitions. [2022-03-15 22:26:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 22:26:04,945 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) 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 20 [2022-03-15 22:26:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:04,949 INFO L225 Difference]: With dead ends: 3172 [2022-03-15 22:26:04,949 INFO L226 Difference]: Without dead ends: 3142 [2022-03-15 22:26:04,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=865, Invalid=6275, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 22:26:04,950 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 120 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:04,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 0 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:26:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2022-03-15 22:26:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 2785. [2022-03-15 22:26:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 2.8958333333333335) internal successors, (8062), 2784 states have internal predecessors, (8062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 8062 transitions. [2022-03-15 22:26:04,982 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 8062 transitions. Word has length 20 [2022-03-15 22:26:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:04,982 INFO L470 AbstractCegarLoop]: Abstraction has 2785 states and 8062 transitions. [2022-03-15 22:26:04,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) 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 22:26:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 8062 transitions. [2022-03-15 22:26:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:04,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:04,984 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:05,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:05,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-03-15 22:26:05,200 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:05,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2027439480, now seen corresponding path program 269 times [2022-03-15 22:26:05,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:05,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720871076] [2022-03-15 22:26:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:05,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:05,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:05,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720871076] [2022-03-15 22:26:05,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720871076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:05,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681829802] [2022-03-15 22:26:05,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:26:05,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:05,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:05,449 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:05,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-15 22:26:05,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:26:05,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:05,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 22:26:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:06,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:07,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681829802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:07,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:07,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 39 [2022-03-15 22:26:07,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1269805069] [2022-03-15 22:26:07,266 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:07,267 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:07,269 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:26:07,269 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:07,411 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [782565#(or (< j1 M1) (<= (+ j2 1) M2)), 782566#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 782564#(< j1 M1), 782567#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:26:07,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:26:07,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:26:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1545, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:26:07,412 INFO L87 Difference]: Start difference. First operand 2785 states and 8062 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 22:26:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:08,371 INFO L93 Difference]: Finished difference Result 3395 states and 9467 transitions. [2022-03-15 22:26:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 22:26:08,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 22:26:08,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:08,376 INFO L225 Difference]: With dead ends: 3395 [2022-03-15 22:26:08,376 INFO L226 Difference]: Without dead ends: 3385 [2022-03-15 22:26:08,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1009, Invalid=3821, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 22:26:08,376 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:08,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:26:08,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2022-03-15 22:26:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 2768. [2022-03-15 22:26:08,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2767 states have (on average 2.8937477412359955) internal successors, (8007), 2767 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 8007 transitions. [2022-03-15 22:26:08,424 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 8007 transitions. Word has length 20 [2022-03-15 22:26:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:08,424 INFO L470 AbstractCegarLoop]: Abstraction has 2768 states and 8007 transitions. [2022-03-15 22:26:08,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 22:26:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 8007 transitions. [2022-03-15 22:26:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:08,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:08,426 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:08,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:08,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-03-15 22:26:08,641 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:08,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash -524717481, now seen corresponding path program 270 times [2022-03-15 22:26:08,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:08,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90203819] [2022-03-15 22:26:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:08,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:08,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:08,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90203819] [2022-03-15 22:26:08,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90203819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:08,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463897571] [2022-03-15 22:26:08,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:26:08,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:08,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:08,923 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:08,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-15 22:26:08,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:26:08,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:08,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:26:08,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:26:09,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:10,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463897571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:10,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:10,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 13] total 34 [2022-03-15 22:26:10,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [335502780] [2022-03-15 22:26:10,151 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:10,152 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:10,154 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:26:10,154 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:10,330 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [791703#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 j2) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (= M2 M1)) (or (<= j1 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1)))), 791701#(or (< j1 M1) (= counter 0)), 791702#(and (or (<= j1 1) (not (< j1 M1))) (or (not (< j1 M1)) (<= 0 j2)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (= M2 M1)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 791704#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:26:10,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:26:10,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:10,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:26:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1323, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:26:10,330 INFO L87 Difference]: Start difference. First operand 2768 states and 8007 transitions. Second operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:26:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:11,277 INFO L93 Difference]: Finished difference Result 2837 states and 8115 transitions. [2022-03-15 22:26:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:26:11,277 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:26:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:11,281 INFO L225 Difference]: With dead ends: 2837 [2022-03-15 22:26:11,281 INFO L226 Difference]: Without dead ends: 2824 [2022-03-15 22:26:11,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=476, Invalid=3064, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:26:11,281 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:11,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:26:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2022-03-15 22:26:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2769. [2022-03-15 22:26:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 2768 states have (on average 2.8934248554913293) internal successors, (8009), 2768 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 8009 transitions. [2022-03-15 22:26:11,314 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 8009 transitions. Word has length 20 [2022-03-15 22:26:11,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:11,314 INFO L470 AbstractCegarLoop]: Abstraction has 2769 states and 8009 transitions. [2022-03-15 22:26:11,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 22:26:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 8009 transitions. [2022-03-15 22:26:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:11,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:11,316 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:11,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:11,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:11,532 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:11,532 INFO L85 PathProgramCache]: Analyzing trace with hash 647538006, now seen corresponding path program 271 times [2022-03-15 22:26:11,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:11,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951627583] [2022-03-15 22:26:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:11,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:11,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:11,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951627583] [2022-03-15 22:26:11,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951627583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:11,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173692851] [2022-03-15 22:26:11,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:26:11,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:11,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:11,728 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:11,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-15 22:26:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:11,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:26:11,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:12,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:12,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173692851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:12,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:12,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:26:12,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [339324686] [2022-03-15 22:26:12,585 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:12,585 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:12,588 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:26:12,588 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:12,911 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [800276#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 800273#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 800274#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 800272#(or (< j1 M1) (= counter 0)), 800277#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2))), 800275#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:26:12,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:26:12,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:26:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1641, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:26:12,912 INFO L87 Difference]: Start difference. First operand 2769 states and 8009 transitions. Second operand has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 22:26:16,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:16,164 INFO L93 Difference]: Finished difference Result 3273 states and 9085 transitions. [2022-03-15 22:26:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 22:26:16,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 22:26:16,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:16,169 INFO L225 Difference]: With dead ends: 3273 [2022-03-15 22:26:16,169 INFO L226 Difference]: Without dead ends: 3235 [2022-03-15 22:26:16,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=976, Invalid=7214, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 22:26:16,170 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 133 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:16,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 0 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:26:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2022-03-15 22:26:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 2774. [2022-03-15 22:26:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.890732059141724) internal successors, (8016), 2773 states have internal predecessors, (8016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 8016 transitions. [2022-03-15 22:26:16,204 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 8016 transitions. Word has length 20 [2022-03-15 22:26:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:16,205 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 8016 transitions. [2022-03-15 22:26:16,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 22:26:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 8016 transitions. [2022-03-15 22:26:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:16,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:16,207 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:16,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:16,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:16,422 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:16,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2045242078, now seen corresponding path program 272 times [2022-03-15 22:26:16,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:16,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562449028] [2022-03-15 22:26:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:16,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:16,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:16,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562449028] [2022-03-15 22:26:16,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562449028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:16,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434952272] [2022-03-15 22:26:16,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:26:16,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:16,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:16,617 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:16,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-15 22:26:16,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:26:16,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:16,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 22:26:16,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:26:17,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:18,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434952272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:18,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:18,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 37 [2022-03-15 22:26:18,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [109625621] [2022-03-15 22:26:18,453 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:18,454 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:18,456 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 22:26:18,456 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:18,707 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [809346#(or (< j1 M1) (<= (+ j2 1) M2)), 809345#(< j1 M1), 809347#(or (< j1 M1) (<= (+ 2 j2) M2)), 809348#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter C)) (or (not (< j1 M1)) (<= (+ j2 1) j1)) (or (not (< j1 M1)) (<= C counter))), 809349#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 22:26:18,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:26:18,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:26:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:26:18,707 INFO L87 Difference]: Start difference. First operand 2774 states and 8016 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 22:26:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:19,369 INFO L93 Difference]: Finished difference Result 3324 states and 9384 transitions. [2022-03-15 22:26:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:26:19,369 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 20 [2022-03-15 22:26:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:19,374 INFO L225 Difference]: With dead ends: 3324 [2022-03-15 22:26:19,374 INFO L226 Difference]: Without dead ends: 3314 [2022-03-15 22:26:19,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=731, Invalid=3051, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 22:26:19,375 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:19,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:26:19,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2022-03-15 22:26:19,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 2795. [2022-03-15 22:26:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 2.8901216893342876) internal successors, (8075), 2794 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 8075 transitions. [2022-03-15 22:26:19,418 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 8075 transitions. Word has length 20 [2022-03-15 22:26:19,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:19,418 INFO L470 AbstractCegarLoop]: Abstraction has 2795 states and 8075 transitions. [2022-03-15 22:26:19,418 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 22:26:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 8075 transitions. [2022-03-15 22:26:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:19,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:19,421 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:19,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:19,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:19,623 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:19,623 INFO L85 PathProgramCache]: Analyzing trace with hash -120916816, now seen corresponding path program 273 times [2022-03-15 22:26:19,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:19,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409402015] [2022-03-15 22:26:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:19,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:19,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:19,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409402015] [2022-03-15 22:26:19,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409402015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:19,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547172458] [2022-03-15 22:26:19,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:26:19,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:19,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:19,787 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:19,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-15 22:26:19,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:26:19,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:26:19,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:20,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:20,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547172458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:20,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:20,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2022-03-15 22:26:20,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1934286261] [2022-03-15 22:26:20,811 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:20,812 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:20,815 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 50 transitions. [2022-03-15 22:26:20,815 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:21,236 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [818460#(or (<= M2 j2) (<= counter 0) (< j1 M1)), 818458#(< j1 M1), 818463#(or (<= counter 0) (< j1 M1) (<= M2 (+ 3 j2))), 818464#(and (or (not (< j1 M1)) (<= 0 j2)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 818459#(or (< j1 M1) (<= (+ j2 1) M2)), 818461#(or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))), 818462#(or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2)))] [2022-03-15 22:26:21,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:26:21,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:26:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=1929, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:26:21,236 INFO L87 Difference]: Start difference. First operand 2795 states and 8075 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 22:26:22,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:22,464 INFO L93 Difference]: Finished difference Result 2841 states and 8152 transitions. [2022-03-15 22:26:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 22:26:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 20 [2022-03-15 22:26:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:22,468 INFO L225 Difference]: With dead ends: 2841 [2022-03-15 22:26:22,468 INFO L226 Difference]: Without dead ends: 2817 [2022-03-15 22:26:22,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=914, Invalid=4636, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 22:26:22,469 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:22,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:26:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2022-03-15 22:26:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2793. [2022-03-15 22:26:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 2.883954154727794) internal successors, (8052), 2792 states have internal predecessors, (8052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 8052 transitions. [2022-03-15 22:26:22,522 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 8052 transitions. Word has length 20 [2022-03-15 22:26:22,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:22,522 INFO L470 AbstractCegarLoop]: Abstraction has 2793 states and 8052 transitions. [2022-03-15 22:26:22,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 22:26:22,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 8052 transitions. [2022-03-15 22:26:22,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:22,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:22,524 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:22,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:22,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:22,731 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:22,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1172314053, now seen corresponding path program 274 times [2022-03-15 22:26:22,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:22,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325985158] [2022-03-15 22:26:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:22,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:23,029 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 22:26:23,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:23,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325985158] [2022-03-15 22:26:23,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325985158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:23,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116628229] [2022-03-15 22:26:23,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:26:23,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:23,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:23,031 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:23,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-15 22:26:23,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:26:23,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:23,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:26:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:23,600 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 22:26:23,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:23,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116628229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:23,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:23,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2022-03-15 22:26:23,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2031651817] [2022-03-15 22:26:23,966 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:23,966 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:23,969 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 46 transitions. [2022-03-15 22:26:23,969 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:24,517 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [827104#(and (or (< j1 M1) (<= (+ 5 j2) M2) (= counter (* C 4))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 4 counter))), 827103#(and (or (< j1 M1) (= (* 3 C) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (+ 2 C) counter) (<= (+ j2 4) M2))), 827100#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 827099#(or (< j2 M2) (< j1 M1) (= counter 0)), 827101#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 827102#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= (+ C 1) counter)) (or (= (+ (* (- 2) C) counter) 0) (< j1 M1) (<= (+ 3 j2) M2))), 827098#(or (< j1 M1) (= counter 0))] [2022-03-15 22:26:24,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:26:24,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:26:24,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:26:24,517 INFO L87 Difference]: Start difference. First operand 2793 states and 8052 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:27,415 INFO L93 Difference]: Finished difference Result 3581 states and 10140 transitions. [2022-03-15 22:26:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 22:26:27,416 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:26:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:27,421 INFO L225 Difference]: With dead ends: 3581 [2022-03-15 22:26:27,421 INFO L226 Difference]: Without dead ends: 3573 [2022-03-15 22:26:27,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 13 SyntacticMatches, 8 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=967, Invalid=7589, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 22:26:27,422 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 169 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:27,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 0 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 22:26:27,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2022-03-15 22:26:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 3117. [2022-03-15 22:26:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 2.902439024390244) internal successors, (9044), 3116 states have internal predecessors, (9044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 9044 transitions. [2022-03-15 22:26:27,473 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 9044 transitions. Word has length 20 [2022-03-15 22:26:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:27,474 INFO L470 AbstractCegarLoop]: Abstraction has 3117 states and 9044 transitions. [2022-03-15 22:26:27,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 9044 transitions. [2022-03-15 22:26:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:27,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:27,477 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:27,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-03-15 22:26:27,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:27,691 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:27,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:27,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1390522317, now seen corresponding path program 275 times [2022-03-15 22:26:27,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:27,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108331471] [2022-03-15 22:26:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:27,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:27,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108331471] [2022-03-15 22:26:27,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108331471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:27,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326643189] [2022-03-15 22:26:27,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:26:27,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:27,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:27,839 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:27,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-15 22:26:27,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:26:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:26:27,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:28,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:28,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326643189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:28,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:28,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2022-03-15 22:26:28,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [352843525] [2022-03-15 22:26:28,372 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:28,373 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:28,375 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2022-03-15 22:26:28,375 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:28,409 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [837076#(< j2 M2), 837157#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:26:28,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:26:28,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:28,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:26:28,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:26:28,409 INFO L87 Difference]: Start difference. First operand 3117 states and 9044 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 22:26:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:28,866 INFO L93 Difference]: Finished difference Result 3631 states and 10275 transitions. [2022-03-15 22:26:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:26:28,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:26:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:28,870 INFO L225 Difference]: With dead ends: 3631 [2022-03-15 22:26:28,870 INFO L226 Difference]: Without dead ends: 3630 [2022-03-15 22:26:28,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=515, Invalid=2347, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:26:28,871 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:28,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:26:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2022-03-15 22:26:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 3174. [2022-03-15 22:26:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3174 states, 3173 states have (on average 2.9023006618342264) internal successors, (9209), 3173 states have internal predecessors, (9209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 9209 transitions. [2022-03-15 22:26:28,911 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 9209 transitions. Word has length 20 [2022-03-15 22:26:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:28,911 INFO L470 AbstractCegarLoop]: Abstraction has 3174 states and 9209 transitions. [2022-03-15 22:26:28,911 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 22:26:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 9209 transitions. [2022-03-15 22:26:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:28,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:28,913 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:28,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-03-15 22:26:29,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-03-15 22:26:29,127 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:29,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:29,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1301396772, now seen corresponding path program 276 times [2022-03-15 22:26:29,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:29,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822460095] [2022-03-15 22:26:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:29,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:29,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:29,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822460095] [2022-03-15 22:26:29,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822460095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:29,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012484253] [2022-03-15 22:26:29,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:26:29,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:29,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:29,399 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:29,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-15 22:26:29,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:26:29,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:29,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:26:29,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:29,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:26:29,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012484253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:29,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:29,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 35 [2022-03-15 22:26:29,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [3196759] [2022-03-15 22:26:29,975 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:29,976 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:29,979 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 46 transitions. [2022-03-15 22:26:29,979 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:30,375 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [847337#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2)) (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2)))), 847335#(or (<= M2 j2) (< j1 M1) (<= (+ j2 4) M2)), 847331#(< j1 M1), 847336#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1))) (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2))), 847333#(or (< j1 M1) (<= (+ 3 j2) M2)), 847334#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 847332#(or (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:26:30,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:26:30,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:30,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:26:30,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:26:30,375 INFO L87 Difference]: Start difference. First operand 3174 states and 9209 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:30,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:30,936 INFO L93 Difference]: Finished difference Result 3201 states and 9264 transitions. [2022-03-15 22:26:30,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:26:30,937 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:26:30,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:30,941 INFO L225 Difference]: With dead ends: 3201 [2022-03-15 22:26:30,941 INFO L226 Difference]: Without dead ends: 3201 [2022-03-15 22:26:30,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=2460, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:26:30,941 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:30,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:26:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2022-03-15 22:26:30,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 3179. [2022-03-15 22:26:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 2.9024543738200124) internal successors, (9224), 3178 states have internal predecessors, (9224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 9224 transitions. [2022-03-15 22:26:30,980 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 9224 transitions. Word has length 20 [2022-03-15 22:26:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:30,980 INFO L470 AbstractCegarLoop]: Abstraction has 3179 states and 9224 transitions. [2022-03-15 22:26:30,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 9224 transitions. [2022-03-15 22:26:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:30,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:30,983 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:30,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-03-15 22:26:31,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-15 22:26:31,199 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:31,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:31,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1901467184, now seen corresponding path program 277 times [2022-03-15 22:26:31,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:31,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003300764] [2022-03-15 22:26:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:31,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:31,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:31,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003300764] [2022-03-15 22:26:31,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003300764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:31,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306504332] [2022-03-15 22:26:31,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:26:31,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:31,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:31,509 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:31,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-15 22:26:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:31,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:26:31,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:31,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:32,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306504332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:32,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:32,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 34 [2022-03-15 22:26:32,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [281823212] [2022-03-15 22:26:32,214 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:32,214 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:32,217 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:26:32,217 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:32,596 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [857070#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 857066#(< j1 M1), 857071#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 857069#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 857067#(or (< j1 M1) (<= (+ j2 1) M2)), 857068#(or (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:26:32,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:26:32,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:26:32,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:26:32,597 INFO L87 Difference]: Start difference. First operand 3179 states and 9224 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 22:26:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:33,200 INFO L93 Difference]: Finished difference Result 3216 states and 9307 transitions. [2022-03-15 22:26:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:26:33,200 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:26:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:33,204 INFO L225 Difference]: With dead ends: 3216 [2022-03-15 22:26:33,204 INFO L226 Difference]: Without dead ends: 3216 [2022-03-15 22:26:33,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:26:33,205 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:33,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:26:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2022-03-15 22:26:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 3184. [2022-03-15 22:26:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 2.902607602890355) internal successors, (9239), 3183 states have internal predecessors, (9239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 9239 transitions. [2022-03-15 22:26:33,241 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 9239 transitions. Word has length 20 [2022-03-15 22:26:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:33,241 INFO L470 AbstractCegarLoop]: Abstraction has 3184 states and 9239 transitions. [2022-03-15 22:26:33,241 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 22:26:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 9239 transitions. [2022-03-15 22:26:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:33,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:33,243 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:33,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-03-15 22:26:33,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-03-15 22:26:33,444 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:33,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:33,444 INFO L85 PathProgramCache]: Analyzing trace with hash -295933020, now seen corresponding path program 278 times [2022-03-15 22:26:33,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:33,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786885] [2022-03-15 22:26:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:33,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:33,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:33,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786885] [2022-03-15 22:26:33,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:33,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167707241] [2022-03-15 22:26:33,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:26:33,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:33,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:33,734 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:33,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-15 22:26:33,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:26:33,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:26:33,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:34,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:34,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167707241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:34,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:34,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 35 [2022-03-15 22:26:34,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [499060323] [2022-03-15 22:26:34,595 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:34,596 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:34,598 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 22:26:34,598 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:34,877 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [866824#(or (< j1 M1) (<= (+ 2 j2) M2)), 866826#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 866825#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 866823#(or (< j1 M1) (<= (+ j2 1) M2)), 866822#(< j1 M1)] [2022-03-15 22:26:34,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:26:34,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:34,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:26:34,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:26:34,878 INFO L87 Difference]: Start difference. First operand 3184 states and 9239 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 22:26:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:35,526 INFO L93 Difference]: Finished difference Result 3215 states and 9307 transitions. [2022-03-15 22:26:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:26:35,527 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 20 [2022-03-15 22:26:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:35,531 INFO L225 Difference]: With dead ends: 3215 [2022-03-15 22:26:35,531 INFO L226 Difference]: Without dead ends: 3215 [2022-03-15 22:26:35,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=2229, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:26:35,531 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:35,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:26:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-03-15 22:26:35,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3184. [2022-03-15 22:26:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 2.902607602890355) internal successors, (9239), 3183 states have internal predecessors, (9239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 9239 transitions. [2022-03-15 22:26:35,567 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 9239 transitions. Word has length 20 [2022-03-15 22:26:35,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:35,567 INFO L470 AbstractCegarLoop]: Abstraction has 3184 states and 9239 transitions. [2022-03-15 22:26:35,567 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 22:26:35,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 9239 transitions. [2022-03-15 22:26:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:35,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:35,569 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:35,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-03-15 22:26:35,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-15 22:26:35,776 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1295751088, now seen corresponding path program 279 times [2022-03-15 22:26:35,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:35,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764028341] [2022-03-15 22:26:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:35,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:36,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:36,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764028341] [2022-03-15 22:26:36,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764028341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:36,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279766458] [2022-03-15 22:26:36,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:26:36,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:36,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:36,064 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:36,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-15 22:26:36,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:26:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:36,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:26:36,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:36,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:36,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279766458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:36,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:36,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 34 [2022-03-15 22:26:36,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1457725500] [2022-03-15 22:26:36,626 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:36,626 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:36,629 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:26:36,629 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:36,815 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [876582#(or (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 876580#(< j1 M1), 876579#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 876581#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:26:36,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:26:36,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:26:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:26:36,816 INFO L87 Difference]: Start difference. First operand 3184 states and 9239 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 22:26:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:37,641 INFO L93 Difference]: Finished difference Result 3243 states and 9362 transitions. [2022-03-15 22:26:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:26:37,641 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 20 [2022-03-15 22:26:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:37,645 INFO L225 Difference]: With dead ends: 3243 [2022-03-15 22:26:37,645 INFO L226 Difference]: Without dead ends: 3243 [2022-03-15 22:26:37,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=337, Invalid=2525, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:26:37,645 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:37,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:26:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2022-03-15 22:26:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3189. [2022-03-15 22:26:37,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 3188 states have (on average 2.903074027603513) internal successors, (9255), 3188 states have internal predecessors, (9255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 9255 transitions. [2022-03-15 22:26:37,681 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 9255 transitions. Word has length 20 [2022-03-15 22:26:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:37,681 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 9255 transitions. [2022-03-15 22:26:37,681 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 22:26:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 9255 transitions. [2022-03-15 22:26:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:37,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:37,683 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:37,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:37,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-03-15 22:26:37,899 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:37,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1088451259, now seen corresponding path program 280 times [2022-03-15 22:26:37,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:37,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027611841] [2022-03-15 22:26:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:37,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:38,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:38,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027611841] [2022-03-15 22:26:38,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027611841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:38,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092535335] [2022-03-15 22:26:38,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:26:38,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:38,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:38,037 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:38,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-15 22:26:38,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:26:38,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 22:26:38,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:38,586 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 22:26:38,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:39,390 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 22:26:39,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092535335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:39,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:39,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 37 [2022-03-15 22:26:39,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [273757317] [2022-03-15 22:26:39,391 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:39,391 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:39,394 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:26:39,394 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:39,477 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [886386#(< j1 M1), 886387#(or (< j1 M1) (<= (+ j2 1) M2)), 886388#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:26:39,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:26:39,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:39,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:26:39,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:26:39,478 INFO L87 Difference]: Start difference. First operand 3189 states and 9255 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:26:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:40,081 INFO L93 Difference]: Finished difference Result 3644 states and 10316 transitions. [2022-03-15 22:26:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:26:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:26:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:40,086 INFO L225 Difference]: With dead ends: 3644 [2022-03-15 22:26:40,086 INFO L226 Difference]: Without dead ends: 3644 [2022-03-15 22:26:40,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=866, Invalid=3040, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 22:26:40,087 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:40,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:26:40,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2022-03-15 22:26:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2108. [2022-03-15 22:26:40,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 2.845277645942098) internal successors, (5995), 2107 states have internal predecessors, (5995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 5995 transitions. [2022-03-15 22:26:40,120 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 5995 transitions. Word has length 20 [2022-03-15 22:26:40,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:40,121 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 5995 transitions. [2022-03-15 22:26:40,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 22:26:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 5995 transitions. [2022-03-15 22:26:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:40,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:40,123 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:40,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:40,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:40,338 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:40,338 INFO L85 PathProgramCache]: Analyzing trace with hash 654359076, now seen corresponding path program 281 times [2022-03-15 22:26:40,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:40,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820933419] [2022-03-15 22:26:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:40,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:40,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:40,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820933419] [2022-03-15 22:26:40,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820933419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:40,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544819965] [2022-03-15 22:26:40,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:26:40,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:40,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:40,717 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:40,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-15 22:26:40,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:26:40,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:40,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:26:40,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:41,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:42,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544819965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:42,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:42,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:26:42,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1672273235] [2022-03-15 22:26:42,289 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:42,290 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:42,292 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:26:42,292 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:42,449 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [894445#(or (< j1 M1) (= counter 0)), 894446#(or (< j2 M2) (< j1 M1) (= counter 0)), 894447#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)))] [2022-03-15 22:26:42,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:26:42,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:42,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:26:42,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:26:42,450 INFO L87 Difference]: Start difference. First operand 2108 states and 5995 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:26:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:43,018 INFO L93 Difference]: Finished difference Result 2141 states and 6054 transitions. [2022-03-15 22:26:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:26:43,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:26:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:43,021 INFO L225 Difference]: With dead ends: 2141 [2022-03-15 22:26:43,021 INFO L226 Difference]: Without dead ends: 2138 [2022-03-15 22:26:43,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 22:26:43,022 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:43,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:26:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2022-03-15 22:26:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 2110. [2022-03-15 22:26:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2109 states have (on average 2.844950213371266) internal successors, (6000), 2109 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 6000 transitions. [2022-03-15 22:26:43,044 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 6000 transitions. Word has length 20 [2022-03-15 22:26:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:43,044 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 6000 transitions. [2022-03-15 22:26:43,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:26:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 6000 transitions. [2022-03-15 22:26:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:43,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:43,046 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:43,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-15 22:26:43,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-15 22:26:43,259 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1519605036, now seen corresponding path program 282 times [2022-03-15 22:26:43,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:43,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648256938] [2022-03-15 22:26:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:43,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:43,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:43,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648256938] [2022-03-15 22:26:43,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648256938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:43,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833306971] [2022-03-15 22:26:43,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:26:43,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:43,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:43,499 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:43,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-15 22:26:43,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:26:43,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:43,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:26:43,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:26:43,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:44,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833306971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:44,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:44,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 34 [2022-03-15 22:26:44,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [410011043] [2022-03-15 22:26:44,034 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:44,035 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:44,037 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2022-03-15 22:26:44,037 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:44,116 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [900980#(or (< j2 M2) (< j1 M1)), 900981#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 900899#(< j2 M2)] [2022-03-15 22:26:44,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:26:44,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:26:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:26:44,117 INFO L87 Difference]: Start difference. First operand 2110 states and 6000 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 22:26:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:44,526 INFO L93 Difference]: Finished difference Result 2129 states and 6037 transitions. [2022-03-15 22:26:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:26:44,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 22:26:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:44,529 INFO L225 Difference]: With dead ends: 2129 [2022-03-15 22:26:44,529 INFO L226 Difference]: Without dead ends: 2129 [2022-03-15 22:26:44,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:26:44,529 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:44,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:26:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-15 22:26:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2110. [2022-03-15 22:26:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2109 states have (on average 2.844950213371266) internal successors, (6000), 2109 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 6000 transitions. [2022-03-15 22:26:44,552 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 6000 transitions. Word has length 20 [2022-03-15 22:26:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:44,552 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 6000 transitions. [2022-03-15 22:26:44,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 22:26:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 6000 transitions. [2022-03-15 22:26:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:44,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:44,554 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:44,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:44,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:44,765 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash 878911046, now seen corresponding path program 283 times [2022-03-15 22:26:44,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:44,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946943848] [2022-03-15 22:26:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:44,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:45,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:45,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946943848] [2022-03-15 22:26:45,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946943848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:45,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442492516] [2022-03-15 22:26:45,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:26:45,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:45,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:45,087 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:45,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-15 22:26:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:45,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:26:45,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:45,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:46,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442492516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:46,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:46,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 34 [2022-03-15 22:26:46,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1653085494] [2022-03-15 22:26:46,209 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:46,210 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:46,212 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 46 transitions. [2022-03-15 22:26:46,212 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:46,765 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [907502#(or (< j1 M1) (<= (+ 2 j2) M2)), 907500#(< j1 M1), 907506#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= M2 (+ 2 j2))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= (+ C 1) counter)) (or (< j1 M1) (<= 2 counter) (<= (+ 5 j2) M2))), 907505#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 907503#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 907504#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 907501#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:26:46,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:26:46,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:46,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:26:46,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:26:46,765 INFO L87 Difference]: Start difference. First operand 2110 states and 6000 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:47,502 INFO L93 Difference]: Finished difference Result 2151 states and 6092 transitions. [2022-03-15 22:26:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:26:47,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:26:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:47,505 INFO L225 Difference]: With dead ends: 2151 [2022-03-15 22:26:47,505 INFO L226 Difference]: Without dead ends: 2151 [2022-03-15 22:26:47,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:26:47,506 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:47,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:26:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2022-03-15 22:26:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2111. [2022-03-15 22:26:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 2.8450236966824645) internal successors, (6003), 2110 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 6003 transitions. [2022-03-15 22:26:47,528 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 6003 transitions. Word has length 20 [2022-03-15 22:26:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:47,528 INFO L470 AbstractCegarLoop]: Abstraction has 2111 states and 6003 transitions. [2022-03-15 22:26:47,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 6003 transitions. [2022-03-15 22:26:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:47,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:47,530 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:47,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:47,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:47,743 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1478981458, now seen corresponding path program 284 times [2022-03-15 22:26:47,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:47,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113833320] [2022-03-15 22:26:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:47,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:48,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:48,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113833320] [2022-03-15 22:26:48,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113833320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:48,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614614309] [2022-03-15 22:26:48,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:26:48,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:48,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:48,049 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:48,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-15 22:26:48,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:26:48,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:26:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:48,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 22:26:48,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614614309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:48,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:48,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 32 [2022-03-15 22:26:48,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1054601648] [2022-03-15 22:26:48,735 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:48,735 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:48,738 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:26:48,738 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:48,991 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [914045#(< j1 M1), 914050#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 914049#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 914048#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 914047#(or (< j1 M1) (<= (+ 2 j2) M2)), 914046#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:26:48,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:26:48,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:26:48,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:26:48,992 INFO L87 Difference]: Start difference. First operand 2111 states and 6003 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 22:26:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:49,441 INFO L93 Difference]: Finished difference Result 2149 states and 6088 transitions. [2022-03-15 22:26:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:26:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:26:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:49,444 INFO L225 Difference]: With dead ends: 2149 [2022-03-15 22:26:49,444 INFO L226 Difference]: Without dead ends: 2148 [2022-03-15 22:26:49,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:26:49,444 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:49,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:26:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2022-03-15 22:26:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2117. [2022-03-15 22:26:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.8454631379962194) internal successors, (6021), 2116 states have internal predecessors, (6021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6021 transitions. [2022-03-15 22:26:49,467 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6021 transitions. Word has length 20 [2022-03-15 22:26:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:49,467 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 6021 transitions. [2022-03-15 22:26:49,467 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 22:26:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6021 transitions. [2022-03-15 22:26:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:49,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:49,469 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:49,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-03-15 22:26:49,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:49,684 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:49,684 INFO L85 PathProgramCache]: Analyzing trace with hash -718418746, now seen corresponding path program 285 times [2022-03-15 22:26:49,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:49,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272268898] [2022-03-15 22:26:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:49,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:49,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:49,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272268898] [2022-03-15 22:26:49,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272268898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:49,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376823340] [2022-03-15 22:26:49,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:26:49,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:49,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:49,890 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:49,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-15 22:26:49,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:26:49,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:49,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:26:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:50,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:26:50,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376823340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:50,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:50,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 9] total 33 [2022-03-15 22:26:50,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1871099505] [2022-03-15 22:26:50,468 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:50,468 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:50,471 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 22:26:50,471 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:50,661 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [920599#(or (< j1 M1) (<= (+ j2 1) M2)), 920601#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 920602#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 920600#(or (< j1 M1) (<= (+ 2 j2) M2)), 920598#(< j1 M1)] [2022-03-15 22:26:50,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:26:50,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:26:50,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:26:50,662 INFO L87 Difference]: Start difference. First operand 2117 states and 6021 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 22:26:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:51,141 INFO L93 Difference]: Finished difference Result 2152 states and 6101 transitions. [2022-03-15 22:26:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:26:51,142 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 20 [2022-03-15 22:26:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:51,144 INFO L225 Difference]: With dead ends: 2152 [2022-03-15 22:26:51,144 INFO L226 Difference]: Without dead ends: 2152 [2022-03-15 22:26:51,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=2081, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:26:51,145 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:51,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:26:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-03-15 22:26:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 2121. [2022-03-15 22:26:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.845754716981132) internal successors, (6033), 2120 states have internal predecessors, (6033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6033 transitions. [2022-03-15 22:26:51,167 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6033 transitions. Word has length 20 [2022-03-15 22:26:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:51,167 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 6033 transitions. [2022-03-15 22:26:51,167 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 22:26:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6033 transitions. [2022-03-15 22:26:51,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:51,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:51,169 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:51,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:51,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:51,384 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:51,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:51,384 INFO L85 PathProgramCache]: Analyzing trace with hash 873265362, now seen corresponding path program 286 times [2022-03-15 22:26:51,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:51,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942805719] [2022-03-15 22:26:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:51,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:51,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:51,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942805719] [2022-03-15 22:26:51,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942805719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:51,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979988100] [2022-03-15 22:26:51,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:26:51,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:51,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:51,705 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:51,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-15 22:26:51,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:26:51,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:51,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:26:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:52,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:26:52,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979988100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:52,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:52,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 32 [2022-03-15 22:26:52,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1543550486] [2022-03-15 22:26:52,610 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:52,610 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:52,613 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:26:52,613 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:52,759 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [927166#(or (< j1 M1) (<= (+ j2 1) M2)), 927167#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 927164#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 927165#(< j1 M1)] [2022-03-15 22:26:52,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:26:52,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:26:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:26:52,760 INFO L87 Difference]: Start difference. First operand 2121 states and 6033 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 22:26:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:53,568 INFO L93 Difference]: Finished difference Result 2168 states and 6136 transitions. [2022-03-15 22:26:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:26:53,568 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 20 [2022-03-15 22:26:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:53,571 INFO L225 Difference]: With dead ends: 2168 [2022-03-15 22:26:53,571 INFO L226 Difference]: Without dead ends: 2168 [2022-03-15 22:26:53,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=324, Invalid=2756, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 22:26:53,571 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:53,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:26:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2022-03-15 22:26:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2124. [2022-03-15 22:26:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.845501648610457) internal successors, (6041), 2123 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 6041 transitions. [2022-03-15 22:26:53,596 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 6041 transitions. Word has length 20 [2022-03-15 22:26:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:53,596 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 6041 transitions. [2022-03-15 22:26:53,596 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 22:26:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 6041 transitions. [2022-03-15 22:26:53,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:53,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:53,598 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:53,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:53,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-03-15 22:26:53,813 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:53,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:53,814 INFO L85 PathProgramCache]: Analyzing trace with hash 231873350, now seen corresponding path program 287 times [2022-03-15 22:26:53,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:53,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849601775] [2022-03-15 22:26:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:53,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:54,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:54,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849601775] [2022-03-15 22:26:54,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849601775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:54,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988408405] [2022-03-15 22:26:54,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:26:54,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:54,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:54,116 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:54,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-15 22:26:54,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:26:54,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:54,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:26:54,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:54,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:55,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988408405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:55,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:55,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:26:55,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1390035906] [2022-03-15 22:26:55,368 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:55,369 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:55,371 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:26:55,371 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:55,474 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [933775#(or (< j2 M2) (< j1 M1) (= counter 0)), 933774#(or (< j1 M1) (= counter 0)), 933776#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:26:55,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:26:55,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:55,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:26:55,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:26:55,474 INFO L87 Difference]: Start difference. First operand 2124 states and 6041 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:26:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:55,843 INFO L93 Difference]: Finished difference Result 2151 states and 6095 transitions. [2022-03-15 22:26:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:26:55,843 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:26:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:55,845 INFO L225 Difference]: With dead ends: 2151 [2022-03-15 22:26:55,845 INFO L226 Difference]: Without dead ends: 2147 [2022-03-15 22:26:55,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=336, Invalid=2114, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:26:55,846 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:55,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:26:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2022-03-15 22:26:55,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 2125. [2022-03-15 22:26:55,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2125 states, 2124 states have (on average 2.8451035781544256) internal successors, (6043), 2124 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 6043 transitions. [2022-03-15 22:26:55,868 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 6043 transitions. Word has length 20 [2022-03-15 22:26:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:55,868 INFO L470 AbstractCegarLoop]: Abstraction has 2125 states and 6043 transitions. [2022-03-15 22:26:55,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:26:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 6043 transitions. [2022-03-15 22:26:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:55,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:55,870 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:55,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-03-15 22:26:56,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-15 22:26:56,086 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:56,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1097119310, now seen corresponding path program 288 times [2022-03-15 22:26:56,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:56,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947378626] [2022-03-15 22:26:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:56,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:56,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:56,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947378626] [2022-03-15 22:26:56,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947378626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:56,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446392275] [2022-03-15 22:26:56,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:26:56,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:56,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:56,368 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:56,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-15 22:26:56,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:26:56,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:56,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:26:56,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:26:56,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:26:56,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446392275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:56,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:56,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 31 [2022-03-15 22:26:56,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562562766] [2022-03-15 22:26:56,886 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:56,886 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:56,889 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2022-03-15 22:26:56,889 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:56,931 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [940263#(< j2 M2), 940342#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:26:56,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:26:56,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:56,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:26:56,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:26:56,931 INFO L87 Difference]: Start difference. First operand 2125 states and 6043 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:26:57,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:57,299 INFO L93 Difference]: Finished difference Result 2445 states and 6868 transitions. [2022-03-15 22:26:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:26:57,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:26:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:57,302 INFO L225 Difference]: With dead ends: 2445 [2022-03-15 22:26:57,302 INFO L226 Difference]: Without dead ends: 2444 [2022-03-15 22:26:57,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=1896, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:26:57,303 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:57,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:26:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-03-15 22:26:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2125. [2022-03-15 22:26:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2125 states, 2124 states have (on average 2.8451035781544256) internal successors, (6043), 2124 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 6043 transitions. [2022-03-15 22:26:57,328 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 6043 transitions. Word has length 20 [2022-03-15 22:26:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:57,328 INFO L470 AbstractCegarLoop]: Abstraction has 2125 states and 6043 transitions. [2022-03-15 22:26:57,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:26:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 6043 transitions. [2022-03-15 22:26:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:26:57,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:57,330 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:57,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-03-15 22:26:57,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:57,539 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:57,539 INFO L85 PathProgramCache]: Analyzing trace with hash -889951760, now seen corresponding path program 289 times [2022-03-15 22:26:57,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:57,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331250024] [2022-03-15 22:26:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:57,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:57,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:57,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331250024] [2022-03-15 22:26:57,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331250024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:57,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230748302] [2022-03-15 22:26:57,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:26:57,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:57,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:57,749 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:57,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-15 22:26:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:57,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:26:57,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:26:58,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:26:58,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230748302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:58,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:58,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 35 [2022-03-15 22:26:58,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1166993243] [2022-03-15 22:26:58,785 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:58,786 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:58,789 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:26:58,789 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:59,188 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [947219#(or (< j1 M1) (<= (+ j2 1) M2)), 947222#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 947223#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 947218#(< j1 M1), 947220#(or (< j1 M1) (<= (+ 2 j2) M2)), 947221#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2))] [2022-03-15 22:26:59,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:26:59,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:26:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:26:59,188 INFO L87 Difference]: Start difference. First operand 2125 states and 6043 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 22:27:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:00,055 INFO L93 Difference]: Finished difference Result 2164 states and 6122 transitions. [2022-03-15 22:27:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:27:00,055 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:27:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:00,058 INFO L225 Difference]: With dead ends: 2164 [2022-03-15 22:27:00,058 INFO L226 Difference]: Without dead ends: 2163 [2022-03-15 22:27:00,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:27:00,058 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:00,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:27:00,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-03-15 22:27:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 2124. [2022-03-15 22:27:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.844559585492228) internal successors, (6039), 2123 states have internal predecessors, (6039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 6039 transitions. [2022-03-15 22:27:00,081 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 6039 transitions. Word has length 20 [2022-03-15 22:27:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:00,081 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 6039 transitions. [2022-03-15 22:27:00,081 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 22:27:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 6039 transitions. [2022-03-15 22:27:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:00,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:00,083 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:00,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-03-15 22:27:00,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-03-15 22:27:00,299 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:00,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:00,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1495667856, now seen corresponding path program 290 times [2022-03-15 22:27:00,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:00,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331068141] [2022-03-15 22:27:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:00,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:00,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331068141] [2022-03-15 22:27:00,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331068141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:00,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337971821] [2022-03-15 22:27:00,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:27:00,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:00,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:00,559 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:00,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-15 22:27:00,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:27:00,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:00,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:27:00,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:00,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:27:01,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337971821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:01,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:01,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 10] total 33 [2022-03-15 22:27:01,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [224434780] [2022-03-15 22:27:01,449 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:01,450 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:01,452 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:27:01,452 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:01,605 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [953809#(< j1 M1), 953810#(or (< j1 M1) (<= (+ j2 1) M2)), 953811#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 953808#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:27:01,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:27:01,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:01,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:27:01,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:27:01,605 INFO L87 Difference]: Start difference. First operand 2124 states and 6039 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 22:27:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:02,273 INFO L93 Difference]: Finished difference Result 2167 states and 6117 transitions. [2022-03-15 22:27:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:27:02,273 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 20 [2022-03-15 22:27:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:02,276 INFO L225 Difference]: With dead ends: 2167 [2022-03-15 22:27:02,276 INFO L226 Difference]: Without dead ends: 2167 [2022-03-15 22:27:02,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 15 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=354, Invalid=2838, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 22:27:02,277 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:02,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2022-03-15 22:27:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 2126. [2022-03-15 22:27:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.844705882352941) internal successors, (6045), 2125 states have internal predecessors, (6045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6045 transitions. [2022-03-15 22:27:02,305 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6045 transitions. Word has length 20 [2022-03-15 22:27:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:02,305 INFO L470 AbstractCegarLoop]: Abstraction has 2126 states and 6045 transitions. [2022-03-15 22:27:02,305 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 22:27:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6045 transitions. [2022-03-15 22:27:02,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:02,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:02,308 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:02,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-03-15 22:27:02,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:02,525 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:02,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2137059868, now seen corresponding path program 291 times [2022-03-15 22:27:02,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:02,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947218199] [2022-03-15 22:27:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:02,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:02,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:02,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947218199] [2022-03-15 22:27:02,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947218199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:02,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209864992] [2022-03-15 22:27:02,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:27:02,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:02,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:02,727 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:02,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-15 22:27:02,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:27:02,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:27:02,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:03,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:04,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209864992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:04,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:04,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:27:04,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [345466009] [2022-03-15 22:27:04,224 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:04,224 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:04,226 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:27:04,226 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:04,387 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [960422#(or (< j2 M2) (< j1 M1) (= counter 0)), 960423#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 960421#(or (< j1 M1) (= counter 0))] [2022-03-15 22:27:04,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:27:04,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:04,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:27:04,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1398, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:27:04,388 INFO L87 Difference]: Start difference. First operand 2126 states and 6045 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:05,093 INFO L93 Difference]: Finished difference Result 2161 states and 6102 transitions. [2022-03-15 22:27:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:27:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:05,096 INFO L225 Difference]: With dead ends: 2161 [2022-03-15 22:27:05,096 INFO L226 Difference]: Without dead ends: 2158 [2022-03-15 22:27:05,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=383, Invalid=2697, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 22:27:05,097 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:05,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2022-03-15 22:27:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2128. [2022-03-15 22:27:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.844381758345087) internal successors, (6050), 2127 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 6050 transitions. [2022-03-15 22:27:05,125 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 6050 transitions. Word has length 20 [2022-03-15 22:27:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:05,125 INFO L470 AbstractCegarLoop]: Abstraction has 2128 states and 6050 transitions. [2022-03-15 22:27:05,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 6050 transitions. [2022-03-15 22:27:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:05,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:05,128 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:05,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:05,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:05,344 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:05,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1271813908, now seen corresponding path program 292 times [2022-03-15 22:27:05,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:05,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528502856] [2022-03-15 22:27:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:05,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:05,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:05,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528502856] [2022-03-15 22:27:05,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528502856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:05,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763568382] [2022-03-15 22:27:05,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:27:05,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:05,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:05,548 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:05,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-15 22:27:05,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:27:05,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:27:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:27:05,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:27:06,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763568382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:06,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:06,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 32 [2022-03-15 22:27:06,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1470873468] [2022-03-15 22:27:06,173 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:06,174 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:06,176 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2022-03-15 22:27:06,176 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:06,219 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [967018#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 966938#(< j2 M2)] [2022-03-15 22:27:06,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:27:06,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:27:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:27:06,220 INFO L87 Difference]: Start difference. First operand 2128 states and 6050 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:27:06,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:06,643 INFO L93 Difference]: Finished difference Result 2579 states and 7192 transitions. [2022-03-15 22:27:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:27:06,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:27:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:06,647 INFO L225 Difference]: With dead ends: 2579 [2022-03-15 22:27:06,647 INFO L226 Difference]: Without dead ends: 2578 [2022-03-15 22:27:06,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=2065, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:27:06,647 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:06,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:27:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-03-15 22:27:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2127. [2022-03-15 22:27:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 2.8447789275634996) internal successors, (6048), 2126 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 6048 transitions. [2022-03-15 22:27:06,674 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 6048 transitions. Word has length 20 [2022-03-15 22:27:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:06,674 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 6048 transitions. [2022-03-15 22:27:06,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:27:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 6048 transitions. [2022-03-15 22:27:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:06,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:06,676 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:06,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-03-15 22:27:06,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-03-15 22:27:06,882 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:06,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:06,882 INFO L85 PathProgramCache]: Analyzing trace with hash -392822522, now seen corresponding path program 293 times [2022-03-15 22:27:06,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:06,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024541506] [2022-03-15 22:27:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:06,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:07,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:07,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024541506] [2022-03-15 22:27:07,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024541506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:07,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816520466] [2022-03-15 22:27:07,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:27:07,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:07,075 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:07,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-15 22:27:07,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:27:07,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:07,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:27:07,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:07,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:07,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816520466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:07,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:07,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2022-03-15 22:27:07,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1421857640] [2022-03-15 22:27:07,809 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:07,809 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:07,812 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 22:27:07,812 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:08,089 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [974038#(or (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 974037#(or (< j1 M1) (<= (+ j2 1) M2)), 974036#(< j1 M1), 974040#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 974039#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= counter C)) (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)))] [2022-03-15 22:27:08,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:27:08,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:08,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:27:08,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1544, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:27:08,089 INFO L87 Difference]: Start difference. First operand 2127 states and 6048 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 22:27:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:08,974 INFO L93 Difference]: Finished difference Result 2231 states and 6278 transitions. [2022-03-15 22:27:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:27:08,974 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 20 [2022-03-15 22:27:08,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:08,977 INFO L225 Difference]: With dead ends: 2231 [2022-03-15 22:27:08,977 INFO L226 Difference]: Without dead ends: 2231 [2022-03-15 22:27:08,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=405, Invalid=3135, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:27:08,978 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:08,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:27:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2022-03-15 22:27:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2127. [2022-03-15 22:27:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 2.8447789275634996) internal successors, (6048), 2126 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 6048 transitions. [2022-03-15 22:27:09,003 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 6048 transitions. Word has length 20 [2022-03-15 22:27:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:09,003 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 6048 transitions. [2022-03-15 22:27:09,003 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 22:27:09,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 6048 transitions. [2022-03-15 22:27:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:09,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:09,005 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:09,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:09,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:09,219 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:09,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1288651247, now seen corresponding path program 294 times [2022-03-15 22:27:09,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:09,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062199140] [2022-03-15 22:27:09,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:09,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:09,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:09,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062199140] [2022-03-15 22:27:09,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062199140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:09,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323144123] [2022-03-15 22:27:09,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:27:09,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:09,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:09,468 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:09,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-15 22:27:09,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:27:09,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:09,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 22:27:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:10,155 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 22:27:10,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:10,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323144123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:10,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:10,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 41 [2022-03-15 22:27:10,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1535209650] [2022-03-15 22:27:10,942 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:10,942 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:10,945 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:27:10,945 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:11,072 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [980716#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (= M2 M1))), 980718#(or (< j1 M1) (<= (+ j2 1) M2)), 980717#(< j1 M1), 980719#(or (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:27:11,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:27:11,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:11,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:27:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:27:11,073 INFO L87 Difference]: Start difference. First operand 2127 states and 6048 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 22:27:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:11,437 INFO L93 Difference]: Finished difference Result 2785 states and 7833 transitions. [2022-03-15 22:27:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:27:11,437 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 20 [2022-03-15 22:27:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:11,440 INFO L225 Difference]: With dead ends: 2785 [2022-03-15 22:27:11,440 INFO L226 Difference]: Without dead ends: 2785 [2022-03-15 22:27:11,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=717, Invalid=2823, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:27:11,441 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:11,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:27:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2022-03-15 22:27:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2152. [2022-03-15 22:27:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 2.8484425848442583) internal successors, (6127), 2151 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 6127 transitions. [2022-03-15 22:27:11,468 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 6127 transitions. Word has length 20 [2022-03-15 22:27:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:11,468 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 6127 transitions. [2022-03-15 22:27:11,468 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 22:27:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 6127 transitions. [2022-03-15 22:27:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:11,470 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:11,470 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:11,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:11,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:11,683 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash 557469574, now seen corresponding path program 295 times [2022-03-15 22:27:11,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:11,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039248546] [2022-03-15 22:27:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:11,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:11,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:11,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039248546] [2022-03-15 22:27:11,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039248546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:11,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940840142] [2022-03-15 22:27:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:27:11,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:11,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:11,882 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:11,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-15 22:27:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:11,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:27:11,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:12,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:12,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940840142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:12,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:12,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:27:12,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1055117803] [2022-03-15 22:27:12,937 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:12,938 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:12,940 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:27:12,940 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:13,044 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [987990#(or (< j2 M2) (< j1 M1) (= counter 0)), 987989#(or (< j1 M1) (= counter 0)), 987991#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)))] [2022-03-15 22:27:13,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:27:13,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:13,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:27:13,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:27:13,045 INFO L87 Difference]: Start difference. First operand 2152 states and 6127 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:13,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:13,592 INFO L93 Difference]: Finished difference Result 2202 states and 6212 transitions. [2022-03-15 22:27:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:27:13,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:13,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:13,596 INFO L225 Difference]: With dead ends: 2202 [2022-03-15 22:27:13,596 INFO L226 Difference]: Without dead ends: 2199 [2022-03-15 22:27:13,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=371, Invalid=2599, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 22:27:13,596 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:13,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2022-03-15 22:27:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2153. [2022-03-15 22:27:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.8485130111524164) internal successors, (6130), 2152 states have internal predecessors, (6130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 6130 transitions. [2022-03-15 22:27:13,624 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 6130 transitions. Word has length 20 [2022-03-15 22:27:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:13,624 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 6130 transitions. [2022-03-15 22:27:13,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 6130 transitions. [2022-03-15 22:27:13,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:13,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:13,634 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:13,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:13,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:13,835 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash -589336027, now seen corresponding path program 296 times [2022-03-15 22:27:13,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:13,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534226032] [2022-03-15 22:27:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:14,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:14,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534226032] [2022-03-15 22:27:14,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534226032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:14,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641243173] [2022-03-15 22:27:14,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:27:14,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:14,101 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:14,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-15 22:27:14,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:27:14,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:14,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:27:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:14,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:14,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641243173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:14,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:14,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 32 [2022-03-15 22:27:14,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1977243787] [2022-03-15 22:27:14,876 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:14,876 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:14,879 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 22:27:14,879 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:15,062 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [994678#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 994679#(and (or (not (< j1 M1)) (<= j1 j2) (<= (+ C counter) 0)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 994677#(or (< j1 M1) (<= (+ 2 j2) M2)), 994676#(or (< j1 M1) (<= (+ j2 1) M2)), 994675#(< j1 M1)] [2022-03-15 22:27:15,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:27:15,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:27:15,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:27:15,063 INFO L87 Difference]: Start difference. First operand 2153 states and 6130 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 22:27:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:15,481 INFO L93 Difference]: Finished difference Result 2215 states and 6263 transitions. [2022-03-15 22:27:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:27:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:27:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:15,485 INFO L225 Difference]: With dead ends: 2215 [2022-03-15 22:27:15,485 INFO L226 Difference]: Without dead ends: 2201 [2022-03-15 22:27:15,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:27:15,485 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:15,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2022-03-15 22:27:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2157. [2022-03-15 22:27:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 2.8469387755102042) internal successors, (6138), 2156 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 6138 transitions. [2022-03-15 22:27:15,514 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 6138 transitions. Word has length 20 [2022-03-15 22:27:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:15,515 INFO L470 AbstractCegarLoop]: Abstraction has 2157 states and 6138 transitions. [2022-03-15 22:27:15,515 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 22:27:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 6138 transitions. [2022-03-15 22:27:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:15,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:15,517 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:15,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:15,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:15,734 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1485164752, now seen corresponding path program 297 times [2022-03-15 22:27:15,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:15,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372105118] [2022-03-15 22:27:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:15,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:15,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:15,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372105118] [2022-03-15 22:27:15,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372105118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:15,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540025193] [2022-03-15 22:27:15,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:27:15,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:15,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:15,970 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:15,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-15 22:27:16,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:27:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:27:16,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:16,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:16,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540025193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:16,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:16,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:27:16,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [169482491] [2022-03-15 22:27:16,958 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:16,959 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:16,961 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:27:16,961 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:17,144 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1001380#(or (< j1 M1) (= counter 0)), 1001381#(or (< j2 M2) (< j1 M1) (= counter 0)), 1001379#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1)))), 1001382#(and (or (< 0 C) (< j1 M1) (<= (+ 2 j2) M2)) (or (= C counter) (< j1 M1) (<= (+ 2 j2) M2)))] [2022-03-15 22:27:17,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:27:17,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:17,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:27:17,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:27:17,145 INFO L87 Difference]: Start difference. First operand 2157 states and 6138 transitions. Second operand has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:27:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:18,130 INFO L93 Difference]: Finished difference Result 2860 states and 8044 transitions. [2022-03-15 22:27:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 22:27:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:27:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:18,135 INFO L225 Difference]: With dead ends: 2860 [2022-03-15 22:27:18,135 INFO L226 Difference]: Without dead ends: 2852 [2022-03-15 22:27:18,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=644, Invalid=3646, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 22:27:18,136 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:18,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2022-03-15 22:27:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2208. [2022-03-15 22:27:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.8509288627095604) internal successors, (6292), 2207 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6292 transitions. [2022-03-15 22:27:18,176 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6292 transitions. Word has length 20 [2022-03-15 22:27:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:18,176 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 6292 transitions. [2022-03-15 22:27:18,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:27:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6292 transitions. [2022-03-15 22:27:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:18,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:18,178 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:18,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:18,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:18,391 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:18,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1381854266, now seen corresponding path program 298 times [2022-03-15 22:27:18,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:18,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716662692] [2022-03-15 22:27:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:18,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:18,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:18,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716662692] [2022-03-15 22:27:18,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716662692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:18,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944078401] [2022-03-15 22:27:18,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:27:18,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:18,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:18,708 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:18,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-15 22:27:18,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:27:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:27:18,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:27:19,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:20,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944078401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:20,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:20,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 37 [2022-03-15 22:27:20,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562955156] [2022-03-15 22:27:20,695 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:20,695 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:20,698 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:27:20,698 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:20,835 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1008861#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 1008860#(or (< j1 M1) (<= (+ j2 1) M2)), 1008859#(< j1 M1)] [2022-03-15 22:27:20,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:27:20,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:20,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:27:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1339, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:27:20,836 INFO L87 Difference]: Start difference. First operand 2208 states and 6292 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22:27:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:21,413 INFO L93 Difference]: Finished difference Result 2552 states and 7185 transitions. [2022-03-15 22:27:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:27:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22:27:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:21,417 INFO L225 Difference]: With dead ends: 2552 [2022-03-15 22:27:21,417 INFO L226 Difference]: Without dead ends: 2552 [2022-03-15 22:27:21,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=552, Invalid=2310, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:27:21,418 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:21,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2022-03-15 22:27:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2211. [2022-03-15 22:27:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 2.851131221719457) internal successors, (6301), 2210 states have internal predecessors, (6301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 6301 transitions. [2022-03-15 22:27:21,446 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 6301 transitions. Word has length 20 [2022-03-15 22:27:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:21,446 INFO L470 AbstractCegarLoop]: Abstraction has 2211 states and 6301 transitions. [2022-03-15 22:27:21,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22:27:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 6301 transitions. [2022-03-15 22:27:21,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:21,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:21,448 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:21,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:21,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:21,664 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash 360956069, now seen corresponding path program 299 times [2022-03-15 22:27:21,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:21,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435703716] [2022-03-15 22:27:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:21,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:21,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:21,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435703716] [2022-03-15 22:27:21,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435703716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:21,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120386098] [2022-03-15 22:27:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:27:21,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:21,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:21,878 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:21,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-15 22:27:21,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:27:21,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:21,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:27:21,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 22:27:22,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:23,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120386098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:23,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:23,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 13] total 33 [2022-03-15 22:27:23,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1459576094] [2022-03-15 22:27:23,142 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:23,142 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:23,145 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:27:23,145 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:23,241 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1016011#(or (< j1 M1) (= counter 0)), 1016012#(or (< j2 M2) (< j1 M1) (= counter 0)), 1016013#(and (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:27:23,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:27:23,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:27:23,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:27:23,242 INFO L87 Difference]: Start difference. First operand 2211 states and 6301 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 22:27:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:23,822 INFO L93 Difference]: Finished difference Result 2347 states and 6598 transitions. [2022-03-15 22:27:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:27:23,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 22:27:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:23,825 INFO L225 Difference]: With dead ends: 2347 [2022-03-15 22:27:23,825 INFO L226 Difference]: Without dead ends: 2291 [2022-03-15 22:27:23,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=492, Invalid=2160, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 22:27:23,825 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:23,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-03-15 22:27:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2167. [2022-03-15 22:27:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.827331486611265) internal successors, (6124), 2166 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 6124 transitions. [2022-03-15 22:27:23,849 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 6124 transitions. Word has length 20 [2022-03-15 22:27:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:23,849 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 6124 transitions. [2022-03-15 22:27:23,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 22:27:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 6124 transitions. [2022-03-15 22:27:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:23,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:23,851 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:23,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:24,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:24,068 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash 666755428, now seen corresponding path program 300 times [2022-03-15 22:27:24,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:24,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348878129] [2022-03-15 22:27:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:24,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:24,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348878129] [2022-03-15 22:27:24,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348878129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:24,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751860187] [2022-03-15 22:27:24,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:27:24,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:24,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:24,361 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:24,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-15 22:27:24,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 22:27:24,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:24,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:27:24,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:24,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:27:25,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751860187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:25,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:25,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 34 [2022-03-15 22:27:25,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1559780722] [2022-03-15 22:27:25,061 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:25,062 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:25,065 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 46 transitions. [2022-03-15 22:27:25,065 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:25,449 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1022875#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 1022876#(or (<= M2 j2) (< j1 M1) (<= (+ 3 j2) M2)), 1022877#(and (or (< j1 M1) (<= 1 counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2))), 1022873#(or (< j1 M1) (<= (+ j2 1) M2)), 1022874#(or (< j1 M1) (<= (+ 2 j2) M2)), 1022872#(< j1 M1), 1022878#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= M2 (+ 2 j2))) (or (< j1 M1) (<= (+ 5 j2) M2) (<= (+ C 1) counter)) (or (< j1 M1) (<= 2 counter) (<= (+ 5 j2) M2)))] [2022-03-15 22:27:25,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:27:25,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:25,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:27:25,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:27:25,449 INFO L87 Difference]: Start difference. First operand 2167 states and 6124 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:25,983 INFO L93 Difference]: Finished difference Result 2212 states and 6226 transitions. [2022-03-15 22:27:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:27:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:27:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:25,986 INFO L225 Difference]: With dead ends: 2212 [2022-03-15 22:27:25,986 INFO L226 Difference]: Without dead ends: 2212 [2022-03-15 22:27:25,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=307, Invalid=2449, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:27:25,986 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:25,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2022-03-15 22:27:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2171. [2022-03-15 22:27:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 2.8267281105990785) internal successors, (6134), 2170 states have internal predecessors, (6134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 6134 transitions. [2022-03-15 22:27:26,009 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 6134 transitions. Word has length 20 [2022-03-15 22:27:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:26,009 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 6134 transitions. [2022-03-15 22:27:26,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 6134 transitions. [2022-03-15 22:27:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:26,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:26,011 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:26,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-03-15 22:27:26,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-03-15 22:27:26,227 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:26,227 INFO L85 PathProgramCache]: Analyzing trace with hash 884963692, now seen corresponding path program 301 times [2022-03-15 22:27:26,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:26,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973906033] [2022-03-15 22:27:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:26,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:26,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973906033] [2022-03-15 22:27:26,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973906033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:26,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595848443] [2022-03-15 22:27:26,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:27:26,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:26,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:26,434 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:26,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-15 22:27:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:26,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:27:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:27:26,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:27:26,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595848443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:26,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:26,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 31 [2022-03-15 22:27:26,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [889271872] [2022-03-15 22:27:26,884 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:26,884 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:26,886 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2022-03-15 22:27:26,887 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:26,932 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1029522#(< j2 M2), 1029601#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)))] [2022-03-15 22:27:26,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:27:26,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:26,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:27:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:27:26,933 INFO L87 Difference]: Start difference. First operand 2171 states and 6134 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:27:27,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:27,331 INFO L93 Difference]: Finished difference Result 2551 states and 7101 transitions. [2022-03-15 22:27:27,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:27:27,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:27:27,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:27,334 INFO L225 Difference]: With dead ends: 2551 [2022-03-15 22:27:27,334 INFO L226 Difference]: Without dead ends: 2548 [2022-03-15 22:27:27,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:27:27,335 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:27,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:27:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2022-03-15 22:27:27,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2175. [2022-03-15 22:27:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 2.8252069917203313) internal successors, (6142), 2174 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 6142 transitions. [2022-03-15 22:27:27,360 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 6142 transitions. Word has length 20 [2022-03-15 22:27:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:27,360 INFO L470 AbstractCegarLoop]: Abstraction has 2175 states and 6142 transitions. [2022-03-15 22:27:27,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:27:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 6142 transitions. [2022-03-15 22:27:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:27,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:27,362 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:27,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:27,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-03-15 22:27:27,578 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1697320370, now seen corresponding path program 302 times [2022-03-15 22:27:27,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:27,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791658106] [2022-03-15 22:27:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:27,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:27,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:27,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791658106] [2022-03-15 22:27:27,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791658106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:27,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744026729] [2022-03-15 22:27:27,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:27:27,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:27,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:27,983 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:27,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-15 22:27:28,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:27:28,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:27:28,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:28,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:29,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744026729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:29,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:29,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:27:29,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [369396180] [2022-03-15 22:27:29,240 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:29,241 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:29,243 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:27:29,243 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:29,410 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1036687#(or (< j2 M2) (< j1 M1) (= counter 0)), 1036685#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 1036688#(or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)), 1036686#(or (< j1 M1) (= counter 0))] [2022-03-15 22:27:29,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:27:29,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:27:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:27:29,410 INFO L87 Difference]: Start difference. First operand 2175 states and 6142 transitions. Second operand has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:27:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:30,171 INFO L93 Difference]: Finished difference Result 2303 states and 6428 transitions. [2022-03-15 22:27:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 22:27:30,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:27:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:30,174 INFO L225 Difference]: With dead ends: 2303 [2022-03-15 22:27:30,174 INFO L226 Difference]: Without dead ends: 2299 [2022-03-15 22:27:30,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=511, Invalid=3149, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 22:27:30,174 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:30,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:27:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2022-03-15 22:27:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2176. [2022-03-15 22:27:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 2.8248275862068963) internal successors, (6144), 2175 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 6144 transitions. [2022-03-15 22:27:30,197 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 6144 transitions. Word has length 20 [2022-03-15 22:27:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:30,197 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 6144 transitions. [2022-03-15 22:27:30,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 20 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 22:27:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 6144 transitions. [2022-03-15 22:27:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:30,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:30,199 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:30,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:30,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-03-15 22:27:30,403 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:30,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:30,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1524593104, now seen corresponding path program 303 times [2022-03-15 22:27:30,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:30,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240778928] [2022-03-15 22:27:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:30,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:30,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:30,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240778928] [2022-03-15 22:27:30,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240778928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:30,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562701437] [2022-03-15 22:27:30,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:27:30,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:30,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:30,717 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:30,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-15 22:27:30,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 22:27:30,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:30,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 22:27:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:31,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:27:31,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562701437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:31,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:31,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 10] total 36 [2022-03-15 22:27:31,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [682784292] [2022-03-15 22:27:31,441 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:31,441 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:31,444 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:27:31,444 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:31,788 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1043538#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2))), 1043537#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter))), 1043534#(or (< j1 M1) (<= (+ j2 1) M2)), 1043535#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 1043536#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 1043533#(< j1 M1)] [2022-03-15 22:27:31,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:27:31,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:31,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:27:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1583, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:27:31,789 INFO L87 Difference]: Start difference. First operand 2176 states and 6144 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 22:27:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:33,151 INFO L93 Difference]: Finished difference Result 2330 states and 6486 transitions. [2022-03-15 22:27:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 22:27:33,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:27:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:33,154 INFO L225 Difference]: With dead ends: 2330 [2022-03-15 22:27:33,154 INFO L226 Difference]: Without dead ends: 2329 [2022-03-15 22:27:33,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=507, Invalid=4749, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 22:27:33,154 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:33,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:27:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2022-03-15 22:27:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 2180. [2022-03-15 22:27:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 2.8251491509866913) internal successors, (6156), 2179 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 6156 transitions. [2022-03-15 22:27:33,177 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 6156 transitions. Word has length 20 [2022-03-15 22:27:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:33,178 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 6156 transitions. [2022-03-15 22:27:33,178 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 22:27:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 6156 transitions. [2022-03-15 22:27:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:33,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:33,180 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:33,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:33,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:33,395 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1523266084, now seen corresponding path program 304 times [2022-03-15 22:27:33,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:33,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649069782] [2022-03-15 22:27:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:33,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:33,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649069782] [2022-03-15 22:27:33,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649069782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:33,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531791405] [2022-03-15 22:27:33,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:27:33,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:33,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:33,724 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:33,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-15 22:27:33,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:27:33,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:33,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:27:33,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:34,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:35,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531791405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:35,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:35,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:27:35,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [992630176] [2022-03-15 22:27:35,162 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:35,162 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:35,165 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:27:35,165 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:35,272 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1050443#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 1050441#(or (< j1 M1) (= counter 0)), 1050442#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:27:35,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:27:35,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:27:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:27:35,272 INFO L87 Difference]: Start difference. First operand 2180 states and 6156 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:36,550 INFO L93 Difference]: Finished difference Result 3053 states and 8459 transitions. [2022-03-15 22:27:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 22:27:36,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:36,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:36,554 INFO L225 Difference]: With dead ends: 3053 [2022-03-15 22:27:36,554 INFO L226 Difference]: Without dead ends: 3046 [2022-03-15 22:27:36,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=652, Invalid=4040, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 22:27:36,554 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:36,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2022-03-15 22:27:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2489. [2022-03-15 22:27:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.8464630225080385) internal successors, (7082), 2488 states have internal predecessors, (7082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 7082 transitions. [2022-03-15 22:27:36,584 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 7082 transitions. Word has length 20 [2022-03-15 22:27:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:36,584 INFO L470 AbstractCegarLoop]: Abstraction has 2489 states and 7082 transitions. [2022-03-15 22:27:36,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 7082 transitions. [2022-03-15 22:27:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:36,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:36,586 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:36,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:36,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-03-15 22:27:36,802 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:36,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1906455252, now seen corresponding path program 305 times [2022-03-15 22:27:36,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:36,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857007162] [2022-03-15 22:27:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:36,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:36,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:36,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857007162] [2022-03-15 22:27:36,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857007162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:36,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328052128] [2022-03-15 22:27:36,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:27:36,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:36,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:36,995 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:36,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-15 22:27:37,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:27:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:27:37,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:37,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 22:27:37,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328052128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:37,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:37,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 28 [2022-03-15 22:27:37,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1662173553] [2022-03-15 22:27:37,440 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:37,440 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:37,442 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2022-03-15 22:27:37,443 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:37,507 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1058596#(< j2 M2), 1058674#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)))] [2022-03-15 22:27:37,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:27:37,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:27:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:27:37,507 INFO L87 Difference]: Start difference. First operand 2489 states and 7082 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:27:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:38,158 INFO L93 Difference]: Finished difference Result 2702 states and 7556 transitions. [2022-03-15 22:27:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:27:38,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:27:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:38,163 INFO L225 Difference]: With dead ends: 2702 [2022-03-15 22:27:38,163 INFO L226 Difference]: Without dead ends: 2701 [2022-03-15 22:27:38,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:27:38,163 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:38,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:27:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-03-15 22:27:38,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2502. [2022-03-15 22:27:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.8484606157536985) internal successors, (7124), 2501 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 7124 transitions. [2022-03-15 22:27:38,192 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 7124 transitions. Word has length 20 [2022-03-15 22:27:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:38,192 INFO L470 AbstractCegarLoop]: Abstraction has 2502 states and 7124 transitions. [2022-03-15 22:27:38,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:27:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 7124 transitions. [2022-03-15 22:27:38,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:38,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:38,194 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:38,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:38,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:38,395 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:38,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2119806096, now seen corresponding path program 306 times [2022-03-15 22:27:38,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:38,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802546722] [2022-03-15 22:27:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:38,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:38,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:38,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802546722] [2022-03-15 22:27:38,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802546722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:38,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862600054] [2022-03-15 22:27:38,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:27:38,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:38,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:38,713 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:38,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-15 22:27:38,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:27:38,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:38,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:27:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:39,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:40,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862600054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:40,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:40,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 35 [2022-03-15 22:27:40,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [821339294] [2022-03-15 22:27:40,032 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:40,032 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:40,035 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:27:40,035 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:40,308 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1066568#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 1066571#(and (or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 1066569#(or (< j1 M1) (= counter 0)), 1066570#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:27:40,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:27:40,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:40,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:27:40,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:27:40,309 INFO L87 Difference]: Start difference. First operand 2502 states and 7124 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) 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 22:27:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:41,832 INFO L93 Difference]: Finished difference Result 2691 states and 7531 transitions. [2022-03-15 22:27:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 22:27:41,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) 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 20 [2022-03-15 22:27:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:41,836 INFO L225 Difference]: With dead ends: 2691 [2022-03-15 22:27:41,836 INFO L226 Difference]: Without dead ends: 2687 [2022-03-15 22:27:41,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=573, Invalid=4119, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 22:27:41,836 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:41,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:41,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2022-03-15 22:27:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2506. [2022-03-15 22:27:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 2.847105788423154) internal successors, (7132), 2505 states have internal predecessors, (7132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 7132 transitions. [2022-03-15 22:27:41,863 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 7132 transitions. Word has length 20 [2022-03-15 22:27:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:41,863 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 7132 transitions. [2022-03-15 22:27:41,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) 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 22:27:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 7132 transitions. [2022-03-15 22:27:41,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:41,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:41,865 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:41,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:42,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:42,077 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash 781920337, now seen corresponding path program 307 times [2022-03-15 22:27:42,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:42,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130183265] [2022-03-15 22:27:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:42,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:42,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:42,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130183265] [2022-03-15 22:27:42,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130183265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:42,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439873868] [2022-03-15 22:27:42,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:27:42,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:42,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:42,218 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:42,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-15 22:27:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:42,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 22:27:42,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:42,804 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 22:27:42,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:43,226 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 22:27:43,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439873868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:43,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:43,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 39 [2022-03-15 22:27:43,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [632037381] [2022-03-15 22:27:43,226 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:43,227 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:43,230 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:27:43,230 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:43,421 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1074486#(or (< j1 M1) (<= (+ j2 1) M2)), 1074488#(or (< j1 M1) (<= (+ 3 j2) M2)), 1074487#(or (< j1 M1) (<= (+ 2 j2) M2)), 1074490#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (<= j2 j1) (not (< j1 M1)))), 1074485#(< j1 M1), 1074489#(or (< j1 M1) (<= (+ j2 4) M2))] [2022-03-15 22:27:43,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:27:43,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:27:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:27:43,422 INFO L87 Difference]: Start difference. First operand 2506 states and 7132 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 22:27:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:43,819 INFO L93 Difference]: Finished difference Result 2735 states and 7627 transitions. [2022-03-15 22:27:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:27:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:27:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:43,823 INFO L225 Difference]: With dead ends: 2735 [2022-03-15 22:27:43,823 INFO L226 Difference]: Without dead ends: 2735 [2022-03-15 22:27:43,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=831, Invalid=3329, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 22:27:43,823 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:43,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:27:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2022-03-15 22:27:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 1740. [2022-03-15 22:27:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1739 states have (on average 2.783208740655549) internal successors, (4840), 1739 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 4840 transitions. [2022-03-15 22:27:43,847 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 4840 transitions. Word has length 20 [2022-03-15 22:27:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:43,847 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 4840 transitions. [2022-03-15 22:27:43,847 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 22:27:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 4840 transitions. [2022-03-15 22:27:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:43,848 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:43,848 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:43,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:44,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2022-03-15 22:27:44,064 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1015031022, now seen corresponding path program 308 times [2022-03-15 22:27:44,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:44,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654747487] [2022-03-15 22:27:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:44,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:44,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654747487] [2022-03-15 22:27:44,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654747487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:44,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601605217] [2022-03-15 22:27:44,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:27:44,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:44,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:44,294 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:44,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-15 22:27:44,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:27:44,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:44,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 22:27:44,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:44,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:27:44,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601605217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:44,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:44,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 31 [2022-03-15 22:27:44,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1913747313] [2022-03-15 22:27:44,724 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:44,724 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:44,727 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:27:44,727 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:45,227 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1080890#(< j1 M1), 1080891#(or (< j1 M1) (<= (+ j2 1) M2)), 1080893#(and (or (< j1 M1) (<= (+ j2 1) M2) (< 0 counter)) (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 1080894#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 1080895#(and (or (< j1 M1) (<= (+ 2 j2) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2))), 1080892#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:27:45,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:27:45,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:45,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:27:45,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:27:45,227 INFO L87 Difference]: Start difference. First operand 1740 states and 4840 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 22:27:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:46,218 INFO L93 Difference]: Finished difference Result 1880 states and 5155 transitions. [2022-03-15 22:27:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 22:27:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:27:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:46,220 INFO L225 Difference]: With dead ends: 1880 [2022-03-15 22:27:46,220 INFO L226 Difference]: Without dead ends: 1879 [2022-03-15 22:27:46,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=609, Invalid=3681, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 22:27:46,221 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:46,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2022-03-15 22:27:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1740. [2022-03-15 22:27:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1739 states have (on average 2.783208740655549) internal successors, (4840), 1739 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 4840 transitions. [2022-03-15 22:27:46,239 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 4840 transitions. Word has length 20 [2022-03-15 22:27:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:46,239 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 4840 transitions. [2022-03-15 22:27:46,239 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 22:27:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 4840 transitions. [2022-03-15 22:27:46,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:46,240 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:46,241 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:46,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:46,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:46,456 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1082536070, now seen corresponding path program 309 times [2022-03-15 22:27:46,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:46,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79595524] [2022-03-15 22:27:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:46,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:46,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79595524] [2022-03-15 22:27:46,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79595524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:46,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506085129] [2022-03-15 22:27:46,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:27:46,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:46,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:46,737 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:46,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-15 22:27:46,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:27:46,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:27:46,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:47,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:47,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506085129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:47,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:47,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 34 [2022-03-15 22:27:47,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [129456000] [2022-03-15 22:27:47,283 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:47,284 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:47,286 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 22:27:47,286 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:47,533 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1086465#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 1086463#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 1086462#(or (< j1 M1) (<= (+ j2 1) M2)), 1086464#(and (or (< j1 M1) (<= (+ j2 1) M2) (< 0 counter)) (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 1086461#(< j1 M1)] [2022-03-15 22:27:47,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:27:47,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:47,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:27:47,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:27:47,534 INFO L87 Difference]: Start difference. First operand 1740 states and 4840 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 22:27:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:48,475 INFO L93 Difference]: Finished difference Result 1914 states and 5248 transitions. [2022-03-15 22:27:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 22:27:48,475 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 20 [2022-03-15 22:27:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:48,477 INFO L225 Difference]: With dead ends: 1914 [2022-03-15 22:27:48,477 INFO L226 Difference]: Without dead ends: 1913 [2022-03-15 22:27:48,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=472, Invalid=3188, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 22:27:48,478 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:48,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-03-15 22:27:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1744. [2022-03-15 22:27:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.7837062535857715) internal successors, (4852), 1743 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 4852 transitions. [2022-03-15 22:27:48,496 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 4852 transitions. Word has length 20 [2022-03-15 22:27:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:48,496 INFO L470 AbstractCegarLoop]: Abstraction has 1744 states and 4852 transitions. [2022-03-15 22:27:48,496 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 22:27:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 4852 transitions. [2022-03-15 22:27:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:48,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:48,498 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:48,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:48,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-03-15 22:27:48,711 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1620747118, now seen corresponding path program 310 times [2022-03-15 22:27:48,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:48,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146591012] [2022-03-15 22:27:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:48,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:49,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:49,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146591012] [2022-03-15 22:27:49,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146591012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:49,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064442319] [2022-03-15 22:27:49,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:27:49,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:49,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:49,066 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:49,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-15 22:27:49,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:27:49,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:49,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:27:49,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:49,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:49,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064442319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:49,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:49,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 32 [2022-03-15 22:27:49,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1797487824] [2022-03-15 22:27:49,693 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:49,694 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:49,696 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:27:49,696 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:49,910 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1092059#(or (< j1 M1) (<= (+ j2 1) M2)), 1092057#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 1092060#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 1092058#(< j1 M1)] [2022-03-15 22:27:49,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:27:49,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:49,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:27:49,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:27:49,910 INFO L87 Difference]: Start difference. First operand 1744 states and 4852 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 22:27:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:50,795 INFO L93 Difference]: Finished difference Result 1892 states and 5194 transitions. [2022-03-15 22:27:50,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 22:27:50,795 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 20 [2022-03-15 22:27:50,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:50,798 INFO L225 Difference]: With dead ends: 1892 [2022-03-15 22:27:50,798 INFO L226 Difference]: Without dead ends: 1891 [2022-03-15 22:27:50,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=481, Invalid=3059, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:27:50,799 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:50,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-03-15 22:27:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1744. [2022-03-15 22:27:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.7837062535857715) internal successors, (4852), 1743 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 4852 transitions. [2022-03-15 22:27:50,821 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 4852 transitions. Word has length 20 [2022-03-15 22:27:50,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:50,821 INFO L470 AbstractCegarLoop]: Abstraction has 1744 states and 4852 transitions. [2022-03-15 22:27:50,821 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 22:27:50,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 4852 transitions. [2022-03-15 22:27:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:50,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:50,823 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:50,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:51,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-15 22:27:51,040 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:51,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:51,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2032828166, now seen corresponding path program 311 times [2022-03-15 22:27:51,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:51,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119306516] [2022-03-15 22:27:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:51,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:51,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:51,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119306516] [2022-03-15 22:27:51,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119306516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:51,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913489124] [2022-03-15 22:27:51,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:27:51,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:51,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:51,382 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:51,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-15 22:27:51,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:27:51,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:51,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:27:51,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:51,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:52,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913489124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:52,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:52,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 13] total 36 [2022-03-15 22:27:52,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1446805551] [2022-03-15 22:27:52,700 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:52,700 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:52,702 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:27:52,703 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:52,833 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1097641#(and (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1)) (or (<= j2 j1) (not (< j1 M1)))), 1097640#(or (< j2 M2) (< j1 M1) (= counter 0)), 1097639#(or (< j1 M1) (= counter 0))] [2022-03-15 22:27:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:27:52,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:27:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:27:52,834 INFO L87 Difference]: Start difference. First operand 1744 states and 4852 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:53,845 INFO L93 Difference]: Finished difference Result 1833 states and 5012 transitions. [2022-03-15 22:27:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 22:27:53,845 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:53,847 INFO L225 Difference]: With dead ends: 1833 [2022-03-15 22:27:53,847 INFO L226 Difference]: Without dead ends: 1825 [2022-03-15 22:27:53,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=449, Invalid=3091, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:27:53,848 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:53,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:27:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-03-15 22:27:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1746. [2022-03-15 22:27:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 2.7845272206303724) internal successors, (4859), 1745 states have internal predecessors, (4859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 4859 transitions. [2022-03-15 22:27:53,880 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 4859 transitions. Word has length 20 [2022-03-15 22:27:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:53,880 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 4859 transitions. [2022-03-15 22:27:53,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 22:27:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 4859 transitions. [2022-03-15 22:27:53,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:53,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:53,882 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:53,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-03-15 22:27:54,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-15 22:27:54,088 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1396893170, now seen corresponding path program 312 times [2022-03-15 22:27:54,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:54,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740471170] [2022-03-15 22:27:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:54,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:54,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740471170] [2022-03-15 22:27:54,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740471170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:54,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797832522] [2022-03-15 22:27:54,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:27:54,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:54,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:54,318 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:54,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-15 22:27:54,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:27:54,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:54,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:27:54,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:54,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:54,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797832522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:54,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:54,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 33 [2022-03-15 22:27:54,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [346012090] [2022-03-15 22:27:54,827 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:54,828 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:54,830 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2022-03-15 22:27:54,830 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:54,898 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1103153#(or (< j2 M2) (< j1 M1)), 1103073#(< j2 M2), 1103154#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:27:54,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:27:54,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:54,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:27:54,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:27:54,899 INFO L87 Difference]: Start difference. First operand 1746 states and 4859 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 22:27:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:55,705 INFO L93 Difference]: Finished difference Result 1834 states and 5003 transitions. [2022-03-15 22:27:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 22:27:55,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 22:27:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:55,708 INFO L225 Difference]: With dead ends: 1834 [2022-03-15 22:27:55,708 INFO L226 Difference]: Without dead ends: 1834 [2022-03-15 22:27:55,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=420, Invalid=2886, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 22:27:55,708 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:55,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2022-03-15 22:27:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1749. [2022-03-15 22:27:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 2.7854691075514872) internal successors, (4869), 1748 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 4869 transitions. [2022-03-15 22:27:55,726 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 4869 transitions. Word has length 20 [2022-03-15 22:27:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:55,726 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 4869 transitions. [2022-03-15 22:27:55,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 22:27:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 4869 transitions. [2022-03-15 22:27:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:55,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:55,728 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:55,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:55,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:55,939 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash 911003056, now seen corresponding path program 313 times [2022-03-15 22:27:55,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:55,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119854627] [2022-03-15 22:27:55,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:55,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:56,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:56,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119854627] [2022-03-15 22:27:56,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119854627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:56,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007938604] [2022-03-15 22:27:56,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:27:56,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:56,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:56,166 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:56,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-15 22:27:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:27:56,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:56,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:27:56,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007938604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:56,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:56,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 31 [2022-03-15 22:27:56,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1422688657] [2022-03-15 22:27:56,810 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:56,811 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:56,813 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:27:56,814 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:57,111 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1108678#(or (< j1 M1) (<= (+ j2 1) M2)), 1108680#(and (or (< j1 M1) (<= (+ 3 j2) M2) (<= counter C)) (or (< j1 M1) (<= (+ j2 1) M2))), 1108681#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 1108682#(and (or (< j1 M1) (<= (+ 2 j2) M2)) (or (<= counter (* 2 C)) (< j1 M1) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2))), 1108679#(or (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 1108677#(< j1 M1)] [2022-03-15 22:27:57,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:27:57,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:27:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:27:57,112 INFO L87 Difference]: Start difference. First operand 1749 states and 4869 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 22:27:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:57,851 INFO L93 Difference]: Finished difference Result 1941 states and 5329 transitions. [2022-03-15 22:27:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 22:27:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:27:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:57,853 INFO L225 Difference]: With dead ends: 1941 [2022-03-15 22:27:57,853 INFO L226 Difference]: Without dead ends: 1941 [2022-03-15 22:27:57,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=487, Invalid=3053, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:27:57,854 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:57,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-03-15 22:27:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1751. [2022-03-15 22:27:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 2.7845714285714287) internal successors, (4873), 1750 states have internal predecessors, (4873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 4873 transitions. [2022-03-15 22:27:57,873 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 4873 transitions. Word has length 20 [2022-03-15 22:27:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:57,873 INFO L470 AbstractCegarLoop]: Abstraction has 1751 states and 4873 transitions. [2022-03-15 22:27:57,873 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 22:27:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 4873 transitions. [2022-03-15 22:27:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:57,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:57,874 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:57,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:58,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:58,088 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash 529140908, now seen corresponding path program 314 times [2022-03-15 22:27:58,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:58,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571292408] [2022-03-15 22:27:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:58,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:58,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571292408] [2022-03-15 22:27:58,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571292408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:58,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407603406] [2022-03-15 22:27:58,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:27:58,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:58,295 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:58,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-15 22:27:58,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:27:58,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:58,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:27:58,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:27:58,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 22:27:58,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407603406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:58,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:58,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 29 [2022-03-15 22:27:58,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [109954401] [2022-03-15 22:27:58,655 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:58,656 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:58,658 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2022-03-15 22:27:58,658 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:58,696 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1114236#(< j2 M2), 1114314#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 22:27:58,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:27:58,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:27:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:27:58,697 INFO L87 Difference]: Start difference. First operand 1751 states and 4873 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:27:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:59,624 INFO L93 Difference]: Finished difference Result 2401 states and 6380 transitions. [2022-03-15 22:27:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 22:27:59,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:27:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:59,627 INFO L225 Difference]: With dead ends: 2401 [2022-03-15 22:27:59,627 INFO L226 Difference]: Without dead ends: 2398 [2022-03-15 22:27:59,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=638, Invalid=3784, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 22:27:59,627 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:59,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:27:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2022-03-15 22:27:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1761. [2022-03-15 22:27:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.7801136363636365) internal successors, (4893), 1760 states have internal predecessors, (4893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 4893 transitions. [2022-03-15 22:27:59,648 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 4893 transitions. Word has length 20 [2022-03-15 22:27:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:59,648 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 4893 transitions. [2022-03-15 22:27:59,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22:27:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 4893 transitions. [2022-03-15 22:27:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:27:59,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:59,650 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:59,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:59,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-03-15 22:27:59,865 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:59,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:59,866 INFO L85 PathProgramCache]: Analyzing trace with hash 419100550, now seen corresponding path program 315 times [2022-03-15 22:27:59,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:59,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061581102] [2022-03-15 22:27:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:59,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:00,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:00,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061581102] [2022-03-15 22:28:00,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061581102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:00,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202886028] [2022-03-15 22:28:00,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:28:00,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:00,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:00,126 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:00,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-15 22:28:00,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:28:00,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:00,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 22:28:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:28:00,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:02,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202886028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:02,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:02,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 15] total 39 [2022-03-15 22:28:02,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [815346516] [2022-03-15 22:28:02,072 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:02,073 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:02,075 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:28:02,075 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:02,166 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1120464#(< j1 M1), 1120466#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 1120465#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:28:02,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:28:02,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:28:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:28:02,167 INFO L87 Difference]: Start difference. First operand 1761 states and 4893 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22:28:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:02,645 INFO L93 Difference]: Finished difference Result 2070 states and 5655 transitions. [2022-03-15 22:28:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:28:02,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22:28:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:02,648 INFO L225 Difference]: With dead ends: 2070 [2022-03-15 22:28:02,648 INFO L226 Difference]: Without dead ends: 2064 [2022-03-15 22:28:02,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=704, Invalid=2836, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:28:02,648 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:02,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:28:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-03-15 22:28:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1766. [2022-03-15 22:28:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.777903682719547) internal successors, (4903), 1765 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4903 transitions. [2022-03-15 22:28:02,667 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4903 transitions. Word has length 20 [2022-03-15 22:28:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:02,667 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 4903 transitions. [2022-03-15 22:28:02,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 22:28:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4903 transitions. [2022-03-15 22:28:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:28:02,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:02,669 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:02,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:02,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-03-15 22:28:02,885 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 488517330, now seen corresponding path program 316 times [2022-03-15 22:28:02,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:02,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104026176] [2022-03-15 22:28:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:02,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:03,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:03,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104026176] [2022-03-15 22:28:03,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104026176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:03,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985718300] [2022-03-15 22:28:03,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:28:03,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:03,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:03,190 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:03,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-03-15 22:28:03,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:28:03,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:03,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:28:03,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:03,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:28:03,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985718300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:03,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:03,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 32 [2022-03-15 22:28:03,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [996057161] [2022-03-15 22:28:03,737 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:03,737 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:03,740 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:28:03,740 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:04,058 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1126255#(and (or (< j1 M1) (<= (+ C 1) counter) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)) (or (< j1 M1) (<= 2 counter) (<= (+ j2 4) M2))), 1126250#(< j1 M1), 1126254#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 1126253#(and (or (< j1 M1) (<= 1 counter) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))), 1126252#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 1126251#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:28:04,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:28:04,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:28:04,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:28:04,059 INFO L87 Difference]: Start difference. First operand 1766 states and 4903 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 22:28:05,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:05,372 INFO L93 Difference]: Finished difference Result 1906 states and 5214 transitions. [2022-03-15 22:28:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 22:28:05,372 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:28:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:05,374 INFO L225 Difference]: With dead ends: 1906 [2022-03-15 22:28:05,374 INFO L226 Difference]: Without dead ends: 1905 [2022-03-15 22:28:05,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=438, Invalid=4392, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 22:28:05,375 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:05,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:28:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2022-03-15 22:28:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1769. [2022-03-15 22:28:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 2.7765837104072397) internal successors, (4909), 1768 states have internal predecessors, (4909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 4909 transitions. [2022-03-15 22:28:05,393 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 4909 transitions. Word has length 20 [2022-03-15 22:28:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:05,393 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 4909 transitions. [2022-03-15 22:28:05,393 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 22:28:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 4909 transitions. [2022-03-15 22:28:05,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:28:05,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:05,395 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:05,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:05,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:05,611 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:05,611 INFO L85 PathProgramCache]: Analyzing trace with hash 106655182, now seen corresponding path program 317 times [2022-03-15 22:28:05,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:05,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756184174] [2022-03-15 22:28:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:05,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:05,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:05,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756184174] [2022-03-15 22:28:05,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756184174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:05,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093709970] [2022-03-15 22:28:05,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:28:05,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:05,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:05,871 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:05,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-03-15 22:28:05,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:28:05,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:05,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:28:05,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:28:06,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:28:06,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093709970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:06,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:06,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 29 [2022-03-15 22:28:06,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1806027618] [2022-03-15 22:28:06,286 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:06,287 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:06,289 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2022-03-15 22:28:06,289 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:06,329 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1131828#(< j2 M2), 1131906#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (= M2 M1)))] [2022-03-15 22:28:06,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:28:06,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:06,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:28:06,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:28:06,330 INFO L87 Difference]: Start difference. First operand 1769 states and 4909 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:28:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:07,159 INFO L93 Difference]: Finished difference Result 2453 states and 6618 transitions. [2022-03-15 22:28:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:28:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:28:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:07,163 INFO L225 Difference]: With dead ends: 2453 [2022-03-15 22:28:07,163 INFO L226 Difference]: Without dead ends: 2450 [2022-03-15 22:28:07,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=2778, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 22:28:07,164 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:07,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:28:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2022-03-15 22:28:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 1791. [2022-03-15 22:28:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 2.7787709497206703) internal successors, (4974), 1790 states have internal predecessors, (4974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 4974 transitions. [2022-03-15 22:28:07,186 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 4974 transitions. Word has length 20 [2022-03-15 22:28:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:07,186 INFO L470 AbstractCegarLoop]: Abstraction has 1791 states and 4974 transitions. [2022-03-15 22:28:07,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22:28:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 4974 transitions. [2022-03-15 22:28:07,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:28:07,188 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:07,188 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:07,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-03-15 22:28:07,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:07,404 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash -106695662, now seen corresponding path program 318 times [2022-03-15 22:28:07,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:07,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029294893] [2022-03-15 22:28:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:07,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:07,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:07,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029294893] [2022-03-15 22:28:07,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029294893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:07,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197768789] [2022-03-15 22:28:07,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:28:07,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:07,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:07,586 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:07,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-03-15 22:28:07,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:28:07,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:07,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:28:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:07,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:08,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197768789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:08,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:08,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 35 [2022-03-15 22:28:08,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1821107026] [2022-03-15 22:28:08,515 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:08,515 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:08,517 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:28:08,518 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:08,671 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1138148#(or (< j1 M1) (= counter 0)), 1138147#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 1138149#(or (< j2 M2) (< j1 M1) (= counter 0)), 1138150#(or (= (+ (* (- 1) C) counter) 0) (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 22:28:08,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:28:08,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:08,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:28:08,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1380, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:28:08,672 INFO L87 Difference]: Start difference. First operand 1791 states and 4974 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) 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 22:28:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:09,804 INFO L93 Difference]: Finished difference Result 2002 states and 5424 transitions. [2022-03-15 22:28:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 22:28:09,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) 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 20 [2022-03-15 22:28:09,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:09,807 INFO L225 Difference]: With dead ends: 2002 [2022-03-15 22:28:09,807 INFO L226 Difference]: Without dead ends: 1990 [2022-03-15 22:28:09,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=643, Invalid=4187, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 22:28:09,808 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:09,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:28:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2022-03-15 22:28:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1796. [2022-03-15 22:28:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 2.778272980501393) internal successors, (4987), 1795 states have internal predecessors, (4987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 4987 transitions. [2022-03-15 22:28:09,827 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 4987 transitions. Word has length 20 [2022-03-15 22:28:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:09,827 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 4987 transitions. [2022-03-15 22:28:09,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) 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 22:28:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 4987 transitions. [2022-03-15 22:28:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:28:09,829 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:09,829 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:09,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:10,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:10,040 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1739425159, now seen corresponding path program 319 times [2022-03-15 22:28:10,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:10,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093299699] [2022-03-15 22:28:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:10,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:10,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:10,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093299699] [2022-03-15 22:28:10,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093299699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:10,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000064928] [2022-03-15 22:28:10,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:28:10,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:10,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:10,405 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:10,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-03-15 22:28:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:10,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:28:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:28:10,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:11,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000064928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:11,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:11,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 13] total 33 [2022-03-15 22:28:11,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1366047210] [2022-03-15 22:28:11,964 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:11,965 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:11,967 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 30 transitions. [2022-03-15 22:28:11,967 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:12,057 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1143954#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 1143952#(or (< j1 M1) (= counter 0)), 1143953#(or (< j2 M2) (< j1 M1) (= counter 0))] [2022-03-15 22:28:12,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:28:12,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:12,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:28:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:28:12,057 INFO L87 Difference]: Start difference. First operand 1796 states and 4987 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 22:28:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:12,635 INFO L93 Difference]: Finished difference Result 1804 states and 4996 transitions. [2022-03-15 22:28:12,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:28:12,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 22:28:12,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:12,638 INFO L225 Difference]: With dead ends: 1804 [2022-03-15 22:28:12,638 INFO L226 Difference]: Without dead ends: 1796 [2022-03-15 22:28:12,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=505, Invalid=1751, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:28:12,639 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:12,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:28:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2022-03-15 22:28:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1789. [2022-03-15 22:28:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 2.779642058165548) internal successors, (4970), 1788 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 4970 transitions. [2022-03-15 22:28:12,661 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 4970 transitions. Word has length 20 [2022-03-15 22:28:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:12,661 INFO L470 AbstractCegarLoop]: Abstraction has 1789 states and 4970 transitions. [2022-03-15 22:28:12,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 22:28:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 4970 transitions. [2022-03-15 22:28:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:28:12,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:12,663 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:12,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-03-15 22:28:12,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-03-15 22:28:12,874 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash 617600049, now seen corresponding path program 320 times [2022-03-15 22:28:12,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:12,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653788212] [2022-03-15 22:28:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:12,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:13,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:13,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653788212] [2022-03-15 22:28:13,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653788212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:13,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500386664] [2022-03-15 22:28:13,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:28:13,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:13,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:13,234 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:13,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-03-15 22:28:13,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:28:13,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:28:13,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:13,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 22:28:14,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500386664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:14,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:14,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 31 [2022-03-15 22:28:14,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [94535628] [2022-03-15 22:28:14,003 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:14,004 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:14,016 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 22:28:14,016 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:14,665 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1149508#(and (or (not (< j1 M1)) (<= j2 0)) (or (not (< j1 M1)) (<= 0 j1)) (or (not (< j1 M1)) (<= j1 j2)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (not (< j1 M1)) (= M2 M1))), 1149506#(and (or (<= M2 4) (< j1 M1) (<= (+ 3 j2) M2)) (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)) (or (<= 4 M2) (< j1 M1) (<= (+ 3 j2) M2))), 1149505#(and (or (<= M2 j2) (<= 4 M2) (< j1 M1) (<= (+ 2 j2) M2)) (or (<= M2 j2) (<= j2 3) (< j1 M1) (<= (+ 2 j2) M2)) (or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2))), 1149507#(and (or (<= M2 4) (< j1 M1) (<= (+ j2 4) M2)) (or (<= 4 M2) (< j1 M1) (<= (+ j2 4) M2)) (or (< j1 M1) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))), 1149504#(or (< j1 M1) (<= (+ j2 1) M2)), 1149503#(< j1 M1)] [2022-03-15 22:28:14,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:28:14,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:14,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:28:14,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:28:14,665 INFO L87 Difference]: Start difference. First operand 1789 states and 4970 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 22:28:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:15,796 INFO L93 Difference]: Finished difference Result 1836 states and 5053 transitions. [2022-03-15 22:28:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 22:28:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:28:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:15,798 INFO L225 Difference]: With dead ends: 1836 [2022-03-15 22:28:15,798 INFO L226 Difference]: Without dead ends: 1825 [2022-03-15 22:28:15,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=359, Invalid=2503, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:28:15,799 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:15,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:28:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-03-15 22:28:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1786. [2022-03-15 22:28:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 2.7781512605042016) internal successors, (4959), 1785 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 4959 transitions. [2022-03-15 22:28:15,817 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 4959 transitions. Word has length 20 [2022-03-15 22:28:15,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:15,817 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 4959 transitions. [2022-03-15 22:28:15,817 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 22:28:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 4959 transitions. [2022-03-15 22:28:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:28:15,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:15,819 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:15,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:16,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-03-15 22:28:16,035 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:16,035 INFO L85 PathProgramCache]: Analyzing trace with hash 493460566, now seen corresponding path program 321 times [2022-03-15 22:28:16,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:16,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406084341] [2022-03-15 22:28:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:16,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:16,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:16,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406084341] [2022-03-15 22:28:16,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406084341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:16,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273019087] [2022-03-15 22:28:16,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:28:16,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:16,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:16,299 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:16,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-03-15 22:28:16,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:28:16,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:16,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 22:28:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:28:16,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 22:28:16,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273019087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:16,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:16,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 32 [2022-03-15 22:28:16,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [909870054] [2022-03-15 22:28:16,886 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:16,887 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:16,890 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 44 transitions. [2022-03-15 22:28:16,890 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:17,439 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1155099#(and (or (<= counter 0) (< j1 M1) (<= (+ 3 j2) M2) (<= counter C)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 1155100#(and (or (< j1 M1) (<= (+ 2 j2) M2)) (or (<= counter (* 2 C)) (< j1 M1) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 2 C) counter) (<= (+ j2 4) M2))), 1155098#(or (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 1155096#(< j1 M1), 1155097#(or (< j1 M1) (<= (+ j2 1) M2)), 1155101#(and (or (< j1 M1) (<= (+ 5 j2) M2) (<= (* 3 C) counter)) (or (< j1 M1) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= (+ 5 j2) M2) (<= 1 counter)) (or (< j1 M1) (<= counter (* 3 C)) (<= (+ 5 j2) M2)))] [2022-03-15 22:28:17,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:28:17,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:17,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:28:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:28:17,440 INFO L87 Difference]: Start difference. First operand 1786 states and 4959 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 22:28:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:17,917 INFO L93 Difference]: Finished difference Result 1934 states and 5316 transitions. [2022-03-15 22:28:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:28:17,918 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 20 [2022-03-15 22:28:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:17,920 INFO L225 Difference]: With dead ends: 1934 [2022-03-15 22:28:17,920 INFO L226 Difference]: Without dead ends: 1934 [2022-03-15 22:28:17,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=388, Invalid=2062, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:28:17,920 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:17,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:28:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2022-03-15 22:28:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1791. [2022-03-15 22:28:17,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 2.7787709497206703) internal successors, (4974), 1790 states have internal predecessors, (4974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 4974 transitions. [2022-03-15 22:28:17,939 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 4974 transitions. Word has length 20 [2022-03-15 22:28:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:17,939 INFO L470 AbstractCegarLoop]: Abstraction has 1791 states and 4974 transitions. [2022-03-15 22:28:17,939 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 22:28:17,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 4974 transitions. [2022-03-15 22:28:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:28:17,940 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:17,940 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:17,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:18,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-03-15 22:28:18,152 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1093530978, now seen corresponding path program 322 times [2022-03-15 22:28:18,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:18,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471333268] [2022-03-15 22:28:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:18,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:18,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471333268] [2022-03-15 22:28:18,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471333268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:18,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204562456] [2022-03-15 22:28:18,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:28:18,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:18,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:18,454 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:18,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-03-15 22:28:18,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:28:18,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:18,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 22:28:18,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:28:18,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:28:19,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204562456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:19,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:19,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-03-15 22:28:19,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1361426060] [2022-03-15 22:28:19,143 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:19,144 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:19,146 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:28:19,146 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:19,568 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1160788#(< j1 M1), 1160792#(and (or (< j1 M1) (<= (+ 2 j2) M2)) (or (<= counter (* 2 C)) (< j1 M1) (<= (+ j2 4) M2)) (or (< j1 M1) (<= (* 2 C) counter) (<= (+ j2 4) M2))), 1160791#(and (or (<= counter 0) (< j1 M1) (<= (+ 3 j2) M2) (<= counter C)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2))), 1160790#(or (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 1160789#(or (< j1 M1) (<= (+ j2 1) M2))] [2022-03-15 22:28:19,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:28:19,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:28:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:28:19,568 INFO L87 Difference]: Start difference. First operand 1791 states and 4974 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 22:28:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:20,123 INFO L93 Difference]: Finished difference Result 1968 states and 5413 transitions. [2022-03-15 22:28:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:28:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:28:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:20,126 INFO L225 Difference]: With dead ends: 1968 [2022-03-15 22:28:20,126 INFO L226 Difference]: Without dead ends: 1968 [2022-03-15 22:28:20,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=439, Invalid=2317, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:28:20,126 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:20,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:28:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-03-15 22:28:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1796. [2022-03-15 22:28:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 2.7793871866295263) internal successors, (4989), 1795 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 4989 transitions. [2022-03-15 22:28:20,146 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 4989 transitions. Word has length 20 [2022-03-15 22:28:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:20,146 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 4989 transitions. [2022-03-15 22:28:20,146 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 22:28:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 4989 transitions. [2022-03-15 22:28:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:28:20,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:20,148 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:20,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:20,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-15 22:28:20,363 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1103869226, now seen corresponding path program 323 times [2022-03-15 22:28:20,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:20,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934197612] [2022-03-15 22:28:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:20,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:20,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934197612] [2022-03-15 22:28:20,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934197612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:20,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632822071] [2022-03-15 22:28:20,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:28:20,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:20,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:20,580 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:20,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-03-15 22:28:20,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:28:20,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:20,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:28:20,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:20,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:28:21,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632822071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:21,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:21,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 34 [2022-03-15 22:28:21,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [630311088] [2022-03-15 22:28:21,216 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:21,216 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:21,219 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 22:28:21,219 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:21,398 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1166531#(or (< j1 M1) (<= (+ j2 1) M2)), 1166530#(< j1 M1), 1166532#(or (<= M2 j2) (< j1 M1) (<= (+ 2 j2) M2)), 1166533#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)) (or (< j1 M1) (<= 1 counter) (<= (+ 2 j2) M2)))] [2022-03-15 22:28:21,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:28:21,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:21,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:28:21,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:28:21,399 INFO L87 Difference]: Start difference. First operand 1796 states and 4989 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 22:28:22,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:22,089 INFO L93 Difference]: Finished difference Result 1992 states and 5488 transitions. [2022-03-15 22:28:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:28:22,089 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 20 [2022-03-15 22:28:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:22,092 INFO L225 Difference]: With dead ends: 1992 [2022-03-15 22:28:22,092 INFO L226 Difference]: Without dead ends: 1991 [2022-03-15 22:28:22,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=482, Invalid=2940, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 22:28:22,093 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:22,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:28:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2022-03-15 22:28:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1800. [2022-03-15 22:28:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 2.7798777098387992) internal successors, (5001), 1799 states have internal predecessors, (5001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 5001 transitions. [2022-03-15 22:28:22,117 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 5001 transitions. Word has length 20 [2022-03-15 22:28:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:22,117 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 5001 transitions. [2022-03-15 22:28:22,117 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 22:28:22,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 5001 transitions. [2022-03-15 22:28:22,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 22:28:22,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:22,119 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:22,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:22,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:22,336 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1028932760, now seen corresponding path program 324 times [2022-03-15 22:28:22,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:22,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048776834] [2022-03-15 22:28:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:22,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:22,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:22,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048776834] [2022-03-15 22:28:22,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048776834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:22,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346290198] [2022-03-15 22:28:22,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:28:22,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:22,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:22,558 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:22,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-03-15 22:28:22,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:28:22,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:22,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:28:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:28:22,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:23,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346290198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:23,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:23,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 38 [2022-03-15 22:28:23,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1611619826] [2022-03-15 22:28:23,085 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:23,086 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:23,090 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 69 transitions. [2022-03-15 22:28:23,090 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:24,805 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 15 new interpolants: [1172330#(and (or (< j1 M1) (<= M2 (+ j2 1)) (<= 5 M2)) (or (< j1 M1) (<= j2 1) (<= M2 (+ j2 1))) (or (<= j2 0) (<= counter 0) (< j1 M1) (<= M2 (+ j2 1)))), 1172334#(and (or (< j1 M1) (<= counter (* 5 C))) (or (< j1 M1) (<= 5 M2)) (or (< j1 M1) (<= M2 (+ 5 j2))) (or (< j1 M1) (<= (* 5 C) counter)) (or (<= j2 0) (< j1 M1))), 1172331#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ 2 j2))) (or (< j1 M1) (<= 1 counter) (<= 5 M2)) (or (< j1 M1) (<= j2 1) (<= 1 counter))), 1172336#(and (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= (* 3 C) counter)) (or (< (+ 2 j1) M1) (<= counter (* 3 C)) (not (< (+ j1 1) M1))) (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= 5 M2)) (or (< (+ 2 j1) M1) (not (< (+ j1 1) M1)) (<= M2 (+ 5 j2))) (or (< (+ 2 j1) M1) (<= j2 0) (not (< (+ j1 1) M1)))), 1172326#(or (< j1 M1) (<= (+ j2 1) M2)), 1172329#(or (< j1 M1) (<= M2 (+ j2 1)) (<= (+ j2 4) M2)), 1172333#(and (or (< j1 M1) (<= j2 1)) (or (<= counter (* 2 C)) (< j1 M1) (<= M2 (+ j2 4))) (or (< j1 M1) (<= C 0) (<= (* C 4) counter)) (or (< j1 M1) (<= 5 M2))), 1172339#(and (or (not (< (+ j1 4) M1)) (< (+ 5 j1) M1) (<= 5 M2)) (or (not (< (+ j1 4) M1)) (<= counter 0) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (<= j2 0) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (<= 0 counter) (< (+ 5 j1) M1)) (or (not (< (+ j1 4) M1)) (< (+ 5 j1) M1) (<= M2 (+ 5 j2)))), 1172337#(and (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= 5 M2)) (or (<= j2 0) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= M2 (+ 5 j2))) (or (<= counter (* 2 C)) (< (+ 3 j1) M1) (not (< (+ 2 j1) M1))) (or (< (+ 3 j1) M1) (not (< (+ 2 j1) M1)) (<= (* 2 C) counter))), 1172338#(and (or (not (< (+ 3 j1) M1)) (<= C counter) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (< (+ j1 4) M1) (<= 5 M2)) (or (not (< (+ 3 j1) M1)) (<= j2 0) (< (+ j1 4) M1)) (or (not (< (+ 3 j1) M1)) (< (+ j1 4) M1) (<= M2 (+ 5 j2))) (or (not (< (+ 3 j1) M1)) (<= counter C) (< (+ j1 4) M1))), 1172325#(< j1 M1), 1172332#(and (or (<= counter 0) (< j1 M1) (<= M2 (+ 3 j2))) (or (< j1 M1) (<= 1 counter) (<= 5 M2)) (or (< j1 M1) (<= j2 1) (<= 1 counter)) (or (<= counter 0) (< j1 M1) (<= (* 3 C) counter))), 1172327#(or (<= M2 j2) (<= counter 0) (< j1 M1) (<= (+ 2 j2) M2)), 1172335#(and (or (not (< j1 M1)) (< (+ j1 1) M1) (<= M2 (+ 5 j2))) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= 5 M2)) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= counter (* C 4))) (or (not (< j1 M1)) (<= j2 0) (< (+ j1 1) M1)) (or (not (< j1 M1)) (< (+ j1 1) M1) (<= (* C 4) counter))), 1172328#(or (<= counter 0) (< j1 M1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 22:28:24,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 22:28:24,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:24,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 22:28:24,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=2435, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:28:24,806 INFO L87 Difference]: Start difference. First operand 1800 states and 5001 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:30,110 INFO L93 Difference]: Finished difference Result 1982 states and 5371 transitions. [2022-03-15 22:28:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 22:28:30,110 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 22:28:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:30,113 INFO L225 Difference]: With dead ends: 1982 [2022-03-15 22:28:30,113 INFO L226 Difference]: Without dead ends: 1982 [2022-03-15 22:28:30,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1379, Invalid=8721, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 22:28:30,114 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 191 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:30,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 0 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:28:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2022-03-15 22:28:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1807. [2022-03-15 22:28:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 2.779623477297896) internal successors, (5020), 1806 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 5020 transitions. [2022-03-15 22:28:30,139 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 5020 transitions. Word has length 21 [2022-03-15 22:28:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:30,139 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 5020 transitions. [2022-03-15 22:28:30,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 5020 transitions. [2022-03-15 22:28:30,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 22:28:30,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:30,141 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:30,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:30,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2022-03-15 22:28:30,358 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash -380976267, now seen corresponding path program 325 times [2022-03-15 22:28:30,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:30,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629580835] [2022-03-15 22:28:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:30,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:30,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:30,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629580835] [2022-03-15 22:28:30,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629580835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:30,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796862931] [2022-03-15 22:28:30,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:28:30,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:30,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:30,556 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:30,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-03-15 22:28:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:30,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:28:30,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:30,864 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 22:28:30,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:31,154 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 22:28:31,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796862931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:31,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:31,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-03-15 22:28:31,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [773161801] [2022-03-15 22:28:31,155 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:31,156 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:31,160 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 67 transitions. [2022-03-15 22:28:31,160 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider Received shutdown request... [2022-03-15 22:28:32,285 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 22:28:32,288 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 22:28:32,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:32,309 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 22:28:32,318 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 22:28:32,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:32,489 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 7,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. [2022-03-15 22:28:32,490 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 22:28:32,490 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 22:28:32,491 INFO L732 BasicCegarLoop]: Path program histogram: [325, 1, 1] [2022-03-15 22:28:32,493 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 22:28:32,493 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 22:28:32,494 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 10:28:32 BasicIcfg [2022-03-15 22:28:32,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 22:28:32,494 INFO L158 Benchmark]: Toolchain (without parser) took 904411.87ms. Allocated memory was 189.8MB in the beginning and 571.5MB in the end (delta: 381.7MB). Free memory was 149.5MB in the beginning and 277.2MB in the end (delta: -127.7MB). Peak memory consumption was 255.3MB. Max. memory is 8.0GB. [2022-03-15 22:28:32,494 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 189.8MB. Free memory is still 150.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 22:28:32,494 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.87ms. Allocated memory is still 189.8MB. Free memory was 149.4MB in the beginning and 147.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:28:32,494 INFO L158 Benchmark]: Boogie Preprocessor took 9.87ms. Allocated memory is still 189.8MB. Free memory was 147.8MB in the beginning and 146.9MB in the end (delta: 912.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:28:32,494 INFO L158 Benchmark]: RCFGBuilder took 189.18ms. Allocated memory is still 189.8MB. Free memory was 146.9MB in the beginning and 137.9MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 22:28:32,494 INFO L158 Benchmark]: TraceAbstraction took 904183.54ms. Allocated memory was 189.8MB in the beginning and 571.5MB in the end (delta: 381.7MB). Free memory was 137.4MB in the beginning and 277.2MB in the end (delta: -139.7MB). Peak memory consumption was 242.7MB. Max. memory is 8.0GB. [2022-03-15 22:28:32,494 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09ms. Allocated memory is still 189.8MB. Free memory is still 150.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.87ms. Allocated memory is still 189.8MB. Free memory was 149.4MB in the beginning and 147.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.87ms. Allocated memory is still 189.8MB. Free memory was 147.8MB in the beginning and 146.9MB in the end (delta: 912.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 189.18ms. Allocated memory is still 189.8MB. Free memory was 146.9MB in the beginning and 137.9MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 904183.54ms. Allocated memory was 189.8MB in the beginning and 571.5MB in the end (delta: 381.7MB). Free memory was 137.4MB in the beginning and 277.2MB in the end (delta: -139.7MB). Peak memory consumption was 242.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 28 PlacesBefore, 18 PlacesAfterwards, 23 TransitionsBefore, 13 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 3 FixpointIterations, 7 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 11 TotalNumberOfCompositions, 48 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 48, positive: 48, positive conditional: 0, positive unconditional: 48, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 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: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 7,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. - TimeoutResultAtElement [Line: 46]: 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 22 with TraceHistMax 7,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. - TimeoutResultAtElement [Line: 46]: 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 22 with TraceHistMax 7,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 904.1s, OverallIterations: 327, TraceHistogramMax: 8, PathProgramHistogramMax: 325, EmptinessCheckTime: 0.4s, AutomataDifference: 382.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28365 SdHoareTripleChecker+Valid, 65.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28365 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 56.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 40309 mSDsCounter, 17871 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 152425 IncrementalHoareTripleChecker+Invalid, 170296 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17871 mSolverCounterUnsat, 0 mSDtfsCounter, 152425 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25652 GetRequests, 5592 SyntacticMatches, 1311 SemanticMatches, 18749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238347 ImplicationChecksByTransitivity, 538.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3189occurred in iteration=281, InterpolantAutomatonStates: 10236, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.5s AutomataMinimizationTime, 326 MinimizatonAttempts, 69724 StatesRemovedByMinimization, 324 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 339.4s InterpolantComputationTime, 11877 NumberOfCodeBlocks, 11877 NumberOfCodeBlocksAsserted, 1269 NumberOfCheckSat, 16833 ConstructedInterpolants, 21 QuantifiedInterpolants, 299008 SizeOfPredicates, 1599 NumberOfNonLiveVariables, 25114 ConjunctsInSsa, 7467 ConjunctsInUnsatCore, 974 InterpolantComputations, 2 PerfectInterpolantSequences, 5331/32371 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